Note: There are other authors with the same name: L. Sprague de Camp (in error)
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Novels
- A Luz e as Trevas [Portuguese] (1987)
- A Planet Called Krishna (1966)
- A rainha rebelde [Portuguese] (1960)
- Abisso del passato [Italian] (1972)
- Al Azif (1973) with Bob Dills and Frank Halpern and J. B. Post and George H. Scithers
- Al Azif (1973) with Abdul Alhazred
- Am Kreuzweg der Welten [German] (1967) with Fletcher Pratt
- An Elephant for Aristotle (1958)
- As horas de Iraz [Portuguese] (1973)
- Chasse cosmique [French] (1959)
-
Conan a Pavoučí bůh?Conan a Pavouci buh[Czech] (1992)
- Conan and the Spider God (1980)
-
Conan barbarzyńca?Conan barbarzynca[Polish] (1995) with Lin Carter
- Conan der Barbar [German] (1982) with Lin Carter and Lyon Sprague de Camp
- Conan der Befreier [German] (1982) with Lin Carter and Lyon Sprague de Camp
- Conan der Bukanier [German] (1972) with Lin Carter
- Conan der Freibeuter [German] (1983) with Lin Carter and Lyon Sprague de Camp
- Conan e il Dio-ragno [Italian] (1985)
- Conan il liberatore [Italian] (1981) with Lin Carter
- Conan l'explorateur [French] (1983) with Lin Carter
- Conan le barbare [French] (1982) with Lin Carter
- Conan le barbare [French] (1983) with L. Carter
- Conan le boucanier [French] (1983) with Lin Carter
- Conan le justicier [French] (1983)
- Conan le libérateur [French] (1983) with Lin Carter
-
Conan le vengeur [French] (1983)
with
Robert E. Howard
and
Björn Nyberg?Bjoern Nyberg
-
Conan mstitel [Czech] (1993)
with
Björn Nyberg?Bjoern Nyberg
- Conan of the Isles (1968) with Lin Carter
- Conan Osvoboditel [Czech] (1996) with Lin Carter
- Conan the Barbarian (1982) with Lin Carter
- Conan the Barbarian: The Official Motion Picture Adaptation (2023) with Lin Carter
- Conan the Buccaneer (1971) with Lin Carter
- Conan the Liberator (1979) with Lin Carter
- Conan und der Spinnengott [German] (1983)
- Conan von den Inseln [German] (1972) with Lin Carter
- Conan von den Inseln [German] (1984) with Lin Carter and Lyon Sprague de Camp
- Conan y el dios araña [Spanish] (1997)
-
Conan – havens skräck?Conan - havens skraeck[Swedish] (1990) with Lin Carter
- Conan, o Bárbaro [Portuguese] (2024) with Lin Carter
- Conan: The Flame Knife (1981) with Robert E. Howard
-
Conans Rückkehr?Conans Rueckkehr[German] (1972) withBjörn Nyberg?Bjoern Nyberg
-
Conans Rückkehr?Conans Rueckkehr[German] (1984) withBjörn Nyberg?Bjoern Nyberg
- Cosmic Manhunt (1954)
- Das Mittelalter findet nicht statt [German] (1965)
- Das Orakel der Fremden [German] (1978) with Lyon Sprague de Camp
- Das Orakel der Fremden [German] (1986)
- De hand van Zei [Dutch] (1976)
- De hoorn van Midgard [Dutch] (1977) with Fletcher Pratt
- De klokken van Iraz [Dutch] (1976)
-
De peur que les ténèbres?De peur que les tenebres[French] (1972)
-
De peur que les ténèbres...?De peur que les tenebres...[French] (1983) with Lyon Sprague de Camp
- De Tritoniaanse ring [Dutch] (1976)
- Demone mancato [Italian] (1990)
- Der Gefangene von Zhamanak [German] (1984)
-
Der große Fetisch?Der grosse Fetisch[German] (1980)
-
Der Raub von Zeï?Der Raub von Zeie[German] (1973)
Der Raub von Zei - Der Schmetterlingsthron [German] (1975)
- Der Stein der Weisen [German] (1987)
- Der Turm von Zanid [German] (1973)
- Der Turm von Zanid [German] (1984)
-
Der ungeköpfte König?Der ungekoepfte Koenig[German] (1994) with Lyon Sprague de Camp
- Die beste aller Welten [German] (1979)
- Die Gebeine von Zora [German] (1986)
- Die Geisel von Zir [German] (1984)
-
Die Königin von Zamba?Die Koenigin von Zamba[German] (1984)
- Die neuen Herrscher [German] (1961) with P. Schuyler Miller
- Die neuen Herrscher [German] (1980) with P. Schuyler Miller
-
Die Prinzessin und der Löwe?Die Prinzessin und der Loewe[German] (1978)
- Die Rettung von Zei [German] (1973)
- Die Rettung von Zei [German] (1984)
- Die Schwerter von Zinjaban [German] (1997)
-
Die stählerne Festung?Die staehlerne Festung[German] (1981) with Fletcher Pratt
-
Die stählerne Festung?Die staehlerne Festung[German] (1981) with Lyon Sprague de Camp and Fletcher Pratt
- Die Suche nach Zei [German] (1984)
- Die Uhren von Iraz [German] (1976)
- Een fakkel voor het keizerrijk [Dutch] (1978)
-
Ein Dämon mit kleinen Fehlern?Ein Daemon mit kleinen Fehlern[German] (1980) with Lyon Sprague de Camp
-
Ein Elefant für Aristoteles?Ein Elefant fuer Aristoteles[German] (1989)
- Genus Homo (1950) with P. Schuyler Miller
- Gorilla Sapiens [Italian] (1979) with P. Schuyler Miller
- Il castello d'acciao [Italian] (1962) with Fletcher Pratt
- Il castello di Atlante [Italian] (1975) with Fletcher Pratt
- L'honorable barbare [French] (1991)
- L'incantatore incompleto [Italian] (1975) with Fletcher Pratt
- La couronne de lumière [French] (1963)
- La dama bizzarra [Italian] (1993) with Catherine Crook de Camp
- La macchina del tempo [Italian] (1962)
- La main de Zei [French] (1973)
- La saga de Zeï [French] (2009) with Lyon Sprague de Camp
- Land of Unreason (1942) with Fletcher Pratt
- Le coffre d'Avlen [French] (1971)
-
Le roi entêté?Le roi entete[French] (1984)
- Le règne du gorille [French] (1951) with P. Schuyler Miller
- Le règne du gorille [French] (1984) with Lyon Sprague de Camp
- Lest Darkness Fall (1941)
- Manótorony [Hungarian] (1995)
- Menschenjagd im Kosmos [German] (1958)
- None But Lucifer (1939) with H. L. Gold
- None But Lucifer (2002) with Horace L. Gold
- Op zoek naar Zei [Dutch] (1976)
- Prinz von Poseidonis [German] (1980)
- Rogue Queen (1951)
- Solomon's Stone (1942)
-
Thalia — Gefangene des Olymp?Thalia - Gefangene des Olymp[German] (1974)
- The Bones of Zora (1983) with Catherine Crook de Camp
- The Carnelian Cube (1948) with Fletcher Pratt
- The Castle of Iron (1950) with Fletcher Pratt
- The Castle of Iron (2013)
- The Clocks of Iraz (1971)
- The Fallible Fiend (1973)
- The Floating Continent (1966)
- The Glory That Was (1960)
- The Goblin Tower (1968)
- The Great Fetish (1978)
- The Hand of Zei (1963)
- The Honorable Barbarian (1989)
- The Hostage of Zir (1977)
- The Incompleat Enchanter (1979) with Fletcher Pratt
- The Incomplete Enchanter (1941) with Fletcher Pratt
- The Incorporated Knight (1987) with Catherine Crook de Camp
- The Land of Unreason (1942) with Fletcher Pratt
- The Pixilated Peeress (1991) with Catherine Crook de Camp
- The Prisoner of Zhamanak (1982)
- The Queen of Zamba (1949)
-
The Return of Conan (1957)
with
Björn Nyberg?Bjoern Nyberg
- The Search for Zei (1962)
- The Stones of Nomuru (1988) with Catherine Crook de Camp
- The Swords of Zinjaban (1991) with Catherine Crook de Camp
- The Tower of Zanid (1958)
- The Treasure of Tranicos (1980) with Robert E. Howard
- The Tritonian Ring (1951)
- The Unbeheaded King (1983)
- The Undesired Princess (1951)
- The Venom Trees of Sunga (1992)
- Une planète nommée Krishna [French] (2009) with Lyon Sprague de Camp
- Von glorreichen Zeiten [German] (1974)
- Vorgriff auf die Vergangenheit [German] (1973)
- Zei [French] (1971)
-
À l'heure d'Iraz?A l'heure d'Iraz[French] (1974)
-
Башня Занида?Bashnya Zanida[Russian] (1996) withЛ. Спрег де Камп?L. Spreg de Kamp
-
Конан отмъстителя?Konan otmastitelya[Bulgarian] (1998) withБьорн Найберг?Byorn Nayberg
-
Конан пирата?Konan pirata[Bulgarian] (1996) withЛин Картър?Lin KartarandЛ. Спрейг?L. Spreyg
- A Gun for Dinosaur and Other Imaginative Tales (1963)
- Aristotle and the Gun and Other Stories (2002)
- Conan der Abenteurer [German] (1971) with Robert E. Howard
- Conan der Abenteurer [German] (1983) with Lyon Sprague de Camp and Robert E. Howard
- Conan der Freibeuter [German] (1970) with Robert E. Howard
- Conan der Pirat [German] (1982) with Lyon Sprague de Camp and Robert E. Howard
-
Conan der Schwertkämpfer?Conan der Schwertkaempfer[German] (1982) with Lin Carter and Lyon Sprague de Camp andBjörn Nyberg?Bjoern Nyberg
-
Conan der Thronräuber?Conan der Thronraeuber[German] (1984) with Lyon Sprague de Camp and Robert E. Howard
- Conan der Usurpator [German] (1971) with Lin Carter and Robert E. Howard
- Conan en de scharlaken citadel [Dutch] (1984) with Lin Carter and Robert E. Howard
-
Conan il barbaro [Italian] (1980)
with
Lin Carter
and
Björn Nyberg?Bjoern Nyberg
- Conan l'Aquilonien [French] (1983) with Lin Carter
- Conan l'aventurier [French] (1980) with Robert E. Howard
- Conan l'usurpateur [French] (1982) with Robert E. Howard
- Conan l'usurpateur [French] (1987) with Lin Carter and Robert E. Howard
- Conan le flibustier [French] (1982) with Robert E. Howard
-
Conan le sabreur [French] (1983)
with
Lin Carter
and
Björn Nyberg?Bjoern Nyberg
- Conan of Aquilonia (1977) with Lin Carter
- Conan piraten [Swedish] (1989) with Robert E. Howard
- Conan segraren [Swedish] (1991) with Robert E. Howard
- Conan the Adventurer (1966) with Robert E. Howard
- Conan the Freebooter (1968) with Robert E. Howard
-
Conan the Swordsman (1978)
with
Lin Carter
and
Björn Nyberg?Bjoern Nyberg
- Conan the Usurper (1967) with Robert E. Howard
-
Conan äventyraren?Conan aeventyraren[Swedish] (1990) with Robert E. Howard
- Construtores de continentes [Portuguese] (1977)
- De bouwers van het continent [Dutch] (1977)
- Demons and Dinosaurs (1970)
- Der Herrscher Pterodactyls [German] (1982)
- Die besten Stories von L. Sprague de Camp [German] (1981)
- Die Chronik von Poseidonis [German] (1978)
- Die Kontinente-Macher [German] (1991)
- Die Mauer der Schlangen & Der grüne Magier [German] (1982) with Fletcher Pratt
- Die Mauer der Schlangen & Der grüne Magier [German] (1982) with Lyon Sprague de Camp and Fletcher Pratt
-
Die Räder der Zeit?Die Raeder der Zeit[German] (1978) with Lyon Sprague de Camp
- Divide and Rule (1948)
- Ein Yankee bei Aristoteles [German] (1980) with Lyon Sprague de Camp
- Footprints on Sand (1981) with Catherine Crook de Camp
- Geschichten aus Gavagans Bar [German] (1982) with Lyon Sprague de Camp and Fletcher Pratt
- Heroes and Hobgoblins (1981)
-
Kâ le terrifiant et autres nouvelles insolites?Ka le terrifiant et autres nouvelles insolites[French] (1977)
- La fin de L'Atlantide [French] (1972) with Robert E. Howard
- Neu-Arkadien [German] (1980) with Lyon Sprague de Camp
- Os dentes do inspector [Portuguese] (1976)
- Phantoms & Fancies (1972)
- Reigen der Fabelwesen [German] (1979)
- Rivers of Time (1993)
- Scribblings (1972)
- Sprague de Camp's New Anthology (1953)
- Tales from Gavagan's Bar (1953) with Fletcher Pratt
- Tales of Conan (1955) with Robert E. Howard
- The Best of L. Sprague de Camp (1978)
- The Compleat Enchanter (1975) with Fletcher Pratt
- The Continent Makers and Other Tales of the Viagens (1953)
- The Enchanter Compleated (1980) with Fletcher Pratt
- The Mathematics of Magic: The Enchanter Stories of de Camp and Pratt (2007) with Fletcher Pratt
- The Purple Pterodactyls (1979)
- The Queen of Zamba (1977)
- The Reluctant Shaman and Other Fantastic Tales (1970)
- The Tritonian Ring and Other Pusadian Tales (1953)
- The Undesired Princess (1951)
- The Virgin & The Wheels (1976)
- The Wheels of If (1949)
- Wall of Serpents (1960) with Fletcher Pratt
- Years in the Making: The Time-Travel Stories of L. Sprague de Camp (2005)
-
Конан авантюриста?Konan avantyurista[Bulgarian] (1997) withРобърт Е. Хауърд?Robart E. Hauard
-
Конан от Аквилония?Konan ot Akviloniya[Bulgarian] (1997) withЛ. Спрег де Камп?L. Spreg de KampandЛин Картър?Lin Kartar
-
Конан узурпатора?Konan uzurpatora[Bulgarian] (1998) withРобърт Е. Хауърд?Robart E. Hauard
- Cosmic Manhunt / Ring Around the Sun (1954) [O/2N] with Clifford D. Simak
- Divide and Rule / The Sword of Rhiannon (1990) [O] with Leigh Brackett
- Il castello d'acciaio [Italian] (1975) [O] with Fletcher Pratt
- La saga de Zeï [French] (2009) [O/1,3,+SF]
- La saga de Zeï [French] (2009) [O] with Lyon Sprague de Camp
- Lest Darkness Fall / Rogue Queen / The Tritonian Ring and Other Pusadian Tales (2014) [O]
- Mathemagie [German] (1988) [O/1-5] with Fletcher Pratt
- Novaria, le roi malgré lui - intégrale [French] (2017) [O]
-
Sagas of Conan (2004) [O/3N]
with
Lin Carter
and
Björn Nyberg?Bjoern Nyberg
- The Compleat Enchanter (2000) [O] with Fletcher Pratt
- The Compleat Enchanter: The Magical Misadventures of Harold Shea (2013) [O]
- The Complete Compleat Enchanter (1989) [O] with Fletcher Pratt
- The Conan Chronicles (1989) [O/1,2,3] with Lin Carter and Robert E. Howard
- The Conan Chronicles 2 (1990) [O/4,5,6] with Lin Carter and Robert E. Howard
- The Hand of Zei (1982) [O/2,3]
- The Hand of Zei / The Search for Zei (1963) [O/2,3]
- The Intrepid Enchanter: The Complete Magical Misadventures of Harold Shea (1988) [O] with Fletcher Pratt
- The Reluctant King (1985) [O/1-3]
- The Undesired Princess & The Enchanted Bunny (1990) [O] with David Drake
- The Virgin of Zesh & The Tower of Zanid (1983) [O/5,6]
-
Башня Занида?Bashnya Zanida[Russian] (1996) [O] with Robert Silverberg and Stefan Wul
-
Башня Занида?Bashnya Zanida[Russian] (1996) [O] withЛ. Спрег де Камп?L. Spreg de KampandРоберт Силверберг?Robert SilverbergandСтефан Вул?Stefan Vul
- "Divide and Rule!" (Part 1 of 2) (1939)
- Apprendisti stregoni (Part 1 of 2) [Italian] (1965) with Fletcher Pratt
- Divide and Rule! (Part 2 of 2) (1939)
- Genus Homo (Complete Novel) (1941) with P. Schuyler Miller
- Gorilla Sapiens (Complete Novel) [Italian] (1953) with P. Schuyler Miller
- Gorilla Sapiens (Complete Novel) [Italian] (1964) with S. P. Miller
- Il castello di ferro (Complete Novel) [Italian] (1965) with Fletcher Pratt
- Il pianeta dei folli (Complete Novel) [Italian] (1967)
- L'abisso Del Passato (Complete Novel) [Italian] (1959)
- L'abisso Del Passato (Complete Novel) [Italian] (1999)
- La gemma di Salomone (Complete Novel) [Italian] (1961)
- La torre di Zanid (Complete Novel) [Italian] (1961)
- Le amazzoni di Avtinid (Complete Novel) [Italian] (1961)
- Le dimensioni del sogno (Complete Novel) [Italian] (1971) with Fletcher Pratt
- Le pietre di Nomura (Complete Novel) [Italian] (1993) with Catherine Crook de Camp
- Lest Darkness Fall (Complete Novel) (1939)
- Lest Darkness Fall (Part 1 of 5) (2014)
- Lest Darkness Fall (Part 2 of 5) (2014)
- Lest Darkness Fall (Part 3 of 5) (2014)
- Lest Darkness Fall (Part 4 of 5) (2014)
- Lest Darkness Fall (Part 5 of 5) (2014)
- None But Lucifer (Complete Novel) (1939) with H. L. Gold
- None But Lucifer (Part 1 of 3) (1994) with Horace L. Gold
- None But Lucifer (Part 2 of 3) (1994) with Horace L. Gold
- None But Lucifer (Part 3 of 3) (1994) with H. L. Gold
- Ritorna Harold Shea (Part 2 of 2) [Italian] (1965) with Fletcher Pratt
- Serpenti Per Posta (Part 1 of 2) [Italian] (1980)
- Serpenti Per Posta (Part 2 of 2) [Italian] (1980)
- Solomon's Stone (Complete Novel) (1942)
- The Fallible Fiend (Part 1 of 2) (1972)
- The Fallible Fiend (Part 2 of 2) (1973)
- The Glory That Was (Complete Novel) (1952)
- The Green Magician (Part 1 of 2) (1978) with Fletcher Pratt
- The Green Magician (Part 2 of 2) (1978) with Fletcher Pratt
- The Hand of Zei (Part 1 of 4) (1950)
- The Hand of Zei (Part 2 of 4) (1950)
- The Hand of Zei (Part 3 of 4) (1950)
- The Hand of Zei (Part 4 of 4) (1951)
- The Land of Unreason (Complete Novel) (1941) with Fletcher Pratt
- The Queen of Zamba (Part 1 of 2) (1949)
- The Queen of Zamba (Part 2 of 2) (1949)
- The Stolen Dormouse (Part 1 of 2) (1941)
- The Stolen Dormouse (Part 2 of 2) (1941)
- The Tower of Zanid (Part 1 of 4) (1958)
- The Tower of Zanid (Part 2 of 4) (1958)
- The Tower of Zanid (Part 3 of 4) (1958)
- The Tower of Zanid (Part 4 of 4) (1958)
- The Tritonian Ring (Complete Novel) (1951)
- The Undesired Princess (Complete Novel) (1942)
- 3000 Years of Fantasy and Science Fiction (1972) with Catherine Crook de Camp
- Conan (1967) with Lin Carter and Robert E. Howard
- Conan [German] (1970) with Lin Carter and Robert E. Howard
- Conan [French] (1972) with Lin Carter and Robert E. Howard
- Conan [German] (1982) with Lin Carter and Lyon Sprague de Camp and Robert E. Howard
- Conan [Swedish] (1987) with Lin Carter and Robert E. Howard
- Conan Cimmeriern [Swedish] (1987) with Lin Carter and Robert E. Howard
- Conan de Barbaar [Dutch] (1983) with Lin Carter and Robert E. Howard
- Conan de Barbaar en de Koningin van de Zwarte Kust [Dutch] (1983) with Lin Carter and Robert E. Howard
- Conan de Barbaar en het Vlammende Mes [Dutch] (1983) with Lin Carter and Robert E. Howard
-
Conan der Rächer?Conan der Raecher[German] (1972) with Robert E. Howard andBjörn Nyberg?Bjoern Nyberg
-
Conan der Rächer?Conan der Raecher[German] (1984) with Lyon Sprague de Camp and Robert E. Howard andBjörn Nyberg?Bjoern Nyberg
- Conan der Wanderer [German] (1971) with Lin Carter and Robert E. Howard
- Conan der Wanderer [German] (1982) with Lin Carter and Lyon Sprague de Camp and Robert E. Howard
- Conan förgöraren [Swedish] (1990) with Lin Carter and Robert E. Howard
-
Conan le Cimmérien?Conan le Cimmerien[French] (1982) with Lin Carter and Robert E. Howard
- Conan le vagabond [French] (1982) with Lin Carter and Robert E. Howard
- Conan of Cimmeria (1969) with Lin Carter and Robert E. Howard
-
Conan the Avenger (1968)
with
Robert E. Howard
and
Björn Nyberg?Bjoern Nyberg
- Conan the Wanderer (1968) with Lin Carter and Robert E. Howard
- Conan von Cimmeria [German] (1970) with Lin Carter and Robert E. Howard
- Conan von Cimmerien [German] (1982) with Lin Carter and Lyon Sprague de Camp and Robert E. Howard
- Dimensioni vietate [Italian] (1964) with C. M. Kornbluth
- Down in the Bottomlands and Other Places (1999) with Harry Turtledove
- Drachenmond [German] (1987)
- Kletba monolitu [Czech] (2004) with Lin Carter and Robert E. Howard
- L'abisso del passato Alba eterna [Italian] (1999) with David Drake
- L'incantatore Rinato [Italian] (2000) with Christopher Stasheff
- Lest Darkness Fall / To Bring the Light (1996) with David Drake
- Schwerter und Magie [German] (1988)
- Science-Fiction-Stories 20 [German] (1973) with uncredited
- Science-Fiction-Stories 23 [German] (1973) with uncredited
- Swords and Sorcery: Stories of Heroic Fantasy (1963)
- Tales Beyond Time (1973) with Catherine Crook de Camp
- The Conan Grimoire (1972) with George H. Scithers
- The Enchanter Reborn (1992) with Christopher Stasheff
- The Exotic Enchanter (1995) with Christopher Stasheff
- The Fantastic Swordsmen (1967)
- The Pugnacious Peacemaker / The Wheels of If (1990) with Harry Turtledove
- The Spell of Seven (1965)
- Warlocks and Warriors (1970)
-
Конан Варваринът?Konan Varvarinăt[Bulgarian] (1991) withРобърт Хауърд?Robart Hauard
-
Конан скитника?Konan skitnika[Bulgarian] (1998) withРобърт Е. Хауърд?Robart E. Hauard
- An den Feuern des Nordens [German] (1981) with Fletcher Pratt
- An den Feuern des Nordens [German] (1981) with Lyon Sprague de Camp and Fletcher Pratt
- Aristotle and the Gun (2013)
- Die Jungfrau von Zesh [German] (1984)
- Die Kunst der Mathemagie [German] (1981) with Fletcher Pratt
- Die Kunst der Mathemagie [German] (1981) with Lyon Sprague de Camp and Fletcher Pratt
- Divide and Rule (2003)
- Im Bann der Mathe-Magie [German] (1974) with Fletcher Pratt
- Sir Harold and the Gnome King (1991)
- The Virgin of Zesh (2011)
- Blond Barbarians & Noble Savages (1975)
- Dark Valley Destiny: The Life of Robert E. Howard (1983) with Catherine Crook de Camp and Jane Whittington Griffin
- H. P. Lovecraft: Eine Biografie [German] (2002) with Lyon Sprague de Camp
- H.P. Lovecraft: A Biography (1996)
- Inventions and Their Management (1937) with Alf K. Berle
- Lands Beyond (1952) with Willy Ley
- Les pionniers de la Fantasy [French] (2010) with Lyon Sprague de Camp
- Literary Swordsmen and Sorcerers (1976)
- Lost Continents: The Atlantis Theme (1975)
- Lost Continents: The Atlantis Theme in History, Science, and Literature (1954)
- Lovecraft: A Biography (1975)
- Lovecraft: Eine Biographie [German] (1989)
- Man and Power (1961)
- Rubber Dinosaurs and Wooden Elephants: Essays on Literature, Film, and History (1996)
- Science Fiction Handbook, Revised: A Guide to Writing Imaginative Literature (1975) with Catherine Crook de Camp
- Science-Fiction Handbook (1953) with Catherine Crook de Camp
- Science-Fiction Handbook (1953)
- Spirits, Stars and Spells (1966) with Catherine Crook de Camp
- Spirits, Stars and Spells (1966) with Catherine C. de Camp
- The Ape-Man Within (1995)
- The Blade of Conan (1979)
- The Conan Reader (1968)
- The Conan Swordbook (1969) with George H. Scithers
- The Day of the Dinosaur (1968) with Catherine Crook de Camp
- The Fringe of the Unknown (1983)
- The Great Monkey Trial (1968)
- The Heroic Age of American Invention (1961)
- The Miscast Barbarian (1975)
- The Ragged Edge of Science (1980)
- The Spell of Conan (1980)
- The Story of Science in America (1967) with Catherine Crook de Camp
- The Story of Science in America (1967) with Catherine C. de Camp
- Time & Chance: An Autobiography (1996)
- Time and Chance: An Autobiography (2011)
- "Elephas frumenti" [French] (1954) with Fletcher Pratt
- "Where to, Please?" (1952) with Fletcher Pratt
- ... Kontrolle ist besser [German] (1980) with Lyon Sprague de Camp
-
A császár legyezője?A csaszar legyezoje[Hungarian] (1990)
A csaaszaar legyezooeje - A Dime Brings You Success (1953) with Fletcher Pratt
- A Fekete idegen [Hungarian] (2002) with Robert E. Howard
- A filha do gigante de gelo [Portuguese] (2005) with Robert E. Howard
- A fábrica dos biscoitos em feitio de animais [Portuguese] (1976)
- A Gun for Dinosaur (1956)
- A Sending of Serpents (1979)
- A Thing of Custom (1957)
- Acabou [Portuguese] (1976)
- Afgelopen [Dutch] (1977)
- Algy (1976)
- Algy [German] (1982)
- All That Glitters (1953) with Fletcher Pratt
- Alles, was glitzert [German] (1982) with Lyon Sprague de Camp and Fletcher Pratt
- An den Feuern des Nordens [German] (1981) with Fletcher Pratt
- An den Feuern des Nordens [German] (1981) with Lyon Sprague de Camp and Fletcher Pratt
- Ananias (1939)
- Aristotle and the Gun (1958)
- Arma para dinossauros [Portuguese] (2017)
- Asokore Power (1940)
- Balsamo's Mirror (1976)
- Balsamos Spiegel [German] (1982)
- Beasts of Bourbon (1951) with Fletcher Pratt
- Begegnung in der Gruft [German] (1970) with Lin Carter
- Bell, Book and Candle (1959) with Fletcher Pratt
- Bell, Book, and Candle (1959) with Fletcher Pratt
- Besser als eine Mausefalle [German] (1982) with Fletcher Pratt
- Besser als eine Mausefalle [German] (1982) with Lyon Sprague de Camp and Fletcher Pratt
- Black Sphinx of Nebthu (1973) with Lin Carter
- Black Tears (1968) with Lin Carter
- Blutmond [German] (1982) with Lin Carter
- Bourbon-Tiere [German] (1982) with Lyon Sprague de Camp and Fletcher Pratt
- Caccia al dinosauro [Italian] (1959)
- Cagliostros Spiegel [German] (1977)
- Calories (1951)
- Calories [French] (2009) with Lyon Sprague de Camp
- Captain Leopard (1996)
- Caveat Emptor (1953) with Fletcher Pratt
- Caveat emptor [German] (1982) with Lyon Sprague de Camp and Fletcher Pratt
-
Chamane malgré soi?Chamane malgre soi[French] (1977)
- Chasse au dinosaure [French] (1976)
- Combustión interna [Spanish] (1986)
- Conan and the Cenotaph (1968) with Lin Carter
- Conan segraren (synopsis) [Swedish] (1991) with Robert E. Howard
-
Conan the Victorious (1957)
with
Björn Nyberg?Bjoern Nyberg
- Conan äventyraren (synopsis) [Swedish] (1990) with Robert E. Howard
- Conan – havens skräck (synopsis) [Swedish] (1990) with Lin Carter
- Conan – havens skräck (synopsis) [Swedish] (1990) with Lin Carter
- Conan, Man of Destiny (1955) with Robert E. Howard
- Construtores de continentes [Portuguese] (1977)
-
Cornzan der Mächtige?Cornzan der Maechtige[German] (1980) with Lyon Sprague de Camp
- Cornzan the Mighty (1955)
- Cornzan, the Mighty (1955)
- Corpus Delectable (1953) with Fletcher Pratt
- Corpus delectable [German] (1982) with Lyon Sprague de Camp and Fletcher Pratt
- Crocamander Quest (1992)
- Cuando sopla el viento nocturno [Spanish] (1966) with Fletcher Pratt
- Dankbarkeit [German] (1980) with Lyon Sprague de Camp
- Dans la salle des morts [French] (1968) with Robert E. Howard
- Darius (1977)
- Darius [German] (1982)
-
Das Auge der Göttin?Das Auge der Goettin[German] (1978)
- Das Ei [German] (1980) with Lyon Sprague de Camp
-
Das Erbstück?Das Erbstueck[German] (1982) with Lyon Sprague de Camp and Fletcher Pratt
- Das ferne Babylon [German] (1982)
- Das Fleisch eines Menschen [German] (1982) with Lyon Sprague de Camp and Fletcher Pratt
- Das Gesicht der Bestie [German] (1992)
- Das Juwel im Turm [German] (1982) with Lin Carter
- Das Liebesnest [German] (1982) with Lyon Sprague de Camp and Fletcher Pratt
- Das Palimpsest des heiligen Augustinus [German] (1982) with Lyon Sprague de Camp and Fletcher Pratt
- Das schwarze Auge [German] (1971) with Lin Carter
-
Das Volk des Gipfels [German] (1982)
with
Björn Nyberg?Bjoern Nyberg
- Davon steht nichts in den Regeln [German] (1979)
- Davon steht nichts in den Regeln [German] (1981)
- De Bloedbevlekte God [Dutch] (1983) with Robert E. Howard
- De bouwers van het continent [Dutch] (1977)
- De Citadel van de Angst [Dutch] (1983) with Lin Carter
- De Dochter van de IJsreus [Dutch] (1983) with Robert E. Howard
- De dödas sal [Swedish] (1987) with uncredited
- De knoestige man [Dutch] (1973)
- De Muil in het Duister [Dutch] (1983) with Lin Carter and Robert E. Howard
- De Stad met de Doodshoofden [Dutch] (1983) with Lin Carter
- De Steen van de Heksekoningin [Dutch] (1981)
- De Sterkste Toverformule ... [Dutch] (1975)
- De tanden van de inspecteur [Dutch] (1977)
- De Vloek van de Monoliet [Dutch] (1983) with Lin Carter
- De Zaal der Doden [Dutch] (1983) with Robert E. Howard
- Dead Man's Chest (1977)
- Den blodfläckade guden [Swedish] (1987) with Robert E. Howard
- Der Befehl [German] (1981)
- Der beste Plan [German] (1978) with Lyon Sprague de Camp
- Der blutbefleckte Gott [German] (1970) with Robert E. Howard
- Der blutbefleckte Gott [German] (1982) with Robert E. Howard
- Der Bretterstapel [German] (1979)
- Der Bretterstapel [German] (1981)
-
Der Dämon aus der Nacht?Der Daemon aus der Nacht[German] (1982) with Lin Carter
- Der exaltierte Professor [German] (1980)
- Der Flammendolch [German] (1971) with Robert E. Howard
- Der Flammendolch [German] (1982) with Robert E. Howard
- Der fliegende Teppich [German] (1976)
- Der Fluch des Monolithen [German] (1982) with Lin Carter
- Der Fluch des Monoliths [German] (1970) with Lin Carter
-
Der gefräßige Hercynier?Der gefraessige Hercynier[German] (1978)
- Der gelbe Mann [German] (1982)
- Der Gott mit dem Pfeifchen [German] (1968)
-
Der grüne Magier?Der gruene Magier[German] (1982) with Fletcher Pratt
-
Der grüne Magier?Der gruene Magier[German] (1982) with Lyon Sprague de Camp and Fletcher Pratt
- Der Kampf in der Grabkammer [German] (1982) with Lin Carter
- Der knorrige Mann [German] (1973) with Lyon Sprague de Camp
- Der knorrige Mann [German] (1979)
- Der magische Kristall [German] (1990) with Lin Carter
- Der Meermann [German] (1981)
- Der Menhir [German] (1982)
- Der Schatz des Tranicos [German] (1971) with Robert E. Howard
- Der Schatz des Tranicos [German] (1984) with Robert E. Howard
-
Der Stein der Hexenkönigin?Der Stein der Hexenkoenigin[German] (1982) with Lyon Sprague de Camp
- Der Stein der Weisen [German] (1982) with Lyon Sprague de Camp and Fletcher Pratt
-
Der Stern von Khorala [German] (1982)
with
Björn Nyberg?Bjoern Nyberg
-
Der stärkere Zauber?Der staerkere Zauber[German] (1978)
- Der Tag des Gerichts [German] (1980) with Lyon Sprague de Camp
- Der Teppich und der Stier [German] (1981)
- Der ungebetene Zecher [German] (1982) with Lyon Sprague de Camp and Fletcher Pratt
- Der Unverbesserliche [German] (1973)
- Der Urmensch [German] (1981)
-
Der wahnsinnige König?Der wahnsinnige Koenig[German] (1970) with Robert E. Howard
-
Der wahnsinnige König?Der wahnsinnige Koenig[German] (1982) with Robert E. Howard
- Des esperviers sur Shem [French] (1998) with Robert E. Howard
-
Des Kaisers Fächer?Des Kaisers Faecher[German] (1981)
-
Des Kaisers Fächer?Des Kaisers Faecher[German] (1981)
-
Des Kaisers Fächer?Des Kaisers Faecher[German] (1987)
- Des loups sur la frontière [French] (1982) with Robert E. Howard
- Des éperviers sur Shem [French] (1982) with Robert E. Howard
- Die blaue Giraffe [German] (1974)
- Die blaue Giraffe [German] (1982)
- Die blaue Giraffe [German] (1984)
- Die Eisraupe [German] (1970) with Lin Carter
- Die Eisschlange [German] (1982) with Lin Carter
-
Die Elfenbeingöttin?Die Elfenbeingoettin[German] (1982) with Lin Carter
- Die Eule und der Affe [German] (1978)
- Die Figur [German] (1982)
- Die Fremden kommen ... [German] (1969)
- Die Geister des Melvin Pye [German] (1979)
- Die Gottesgabe [German] (1982) with Lyon Sprague de Camp and Fletcher Pratt
- Die Hunnen [German] (1982)
- Die Jungfrau von Zesh [German] (1984)
- Die Kontinente-Macher [German] (1991)
- Die Kriegerrasse [German] (1978) with Lyon Sprague de Camp
- Die Kunst der Mathemagie [German] (1981) with Fletcher Pratt
- Die Kunst der Mathemagie [German] (1981) with Lyon Sprague de Camp and Fletcher Pratt
- Die Lampe [German] (1982)
- Die Lampe von Atlantis [German] (1981)
- Die Lampe von Atlantis [German] (1987) with Lyon Sprague de Camp
- Die Mauer der Schlangen [German] (1982) with Fletcher Pratt
- Die Mauer der Schlangen [German] (1982) with Lyon Sprague de Camp and Fletcher Pratt
-
Die Meisterköchin?Die Meisterkoechin[German] (1982) with Lyon Sprague de Camp and Fletcher Pratt
- Die neue Stellung [German] (1981)
- Die Purpurnen Pterodaktylen [German] (1982)
- Die Ruine des Schreckens [German] (1970) with Lin Carter
- Die Ruine des Schreckens [German] (1982) with Lin Carter
-
Die Räder der Zeit?Die Raeder der Zeit[German] (1978) with Lyon Sprague de Camp
-
Die Sache mit dem Schloß?Die Sache mit dem Schloss[German] (1982) with Lyon Sprague de Camp and Fletcher Pratt
- Die Schatztruhe [German] (1982)
- Die schwarze Kugel [German] (1982) with Lyon Sprague de Camp and Fletcher Pratt
-
Die Stadt der Schädel?Die Stadt der Schaedel[German] (1970) with Lin Carter
-
Die Stadt der Schädel?Die Stadt der Schaedel[German] (1982) with Lin Carter
-
Die Straße der Adler?Die Strasse der Adler[German] (1970) with Robert E. Howard
-
Die Straße der Adler?Die Strasse der Adler[German] (1982) with Robert E. Howard
- Die Tochter des Frostriesen [German] (1970) with Robert E. Howard
- Die Trommeln von Tombalku [German] (1971) with Robert E. Howard
- Die Trommeln von Tombalku [German] (1973) with Robert E. Howard
- Die Trommeln von Tombalku [German] (1983) with Lyon Sprague de Camp and Robert E. Howard
- Die Weisheit des Ostens [German] (1979)
- Die Weissenbroch-Brille [German] (1982) with Lyon Sprague de Camp and Fletcher Pratt
-
Die Zähne des Inspektors?Die Zaehne des Inspektors[German] (1981)
- Divide and Rule (1939)
-
Doupě ledového červa?Doupe ledoveho cerva[Czech] (2004) with Lin Carter
- Drei Ellen Drachenhaut [German] (1981)
- Drums of Tombalku (1966) with Robert E. Howard
- Dvorana smrti [Croatian] (1998) with Robert E. Howard
-
Dämon aus der Nacht?Daemon aus der Nacht[German] (1970) with Lin Carter and Robert E. Howard
- Dödskallarnas stad [Swedish] (1987) with uncredited
- Edorics Eenhoorn [Dutch] (1982)
-
Ein für allemal?Ein fuer allemal[German] (1991)
-
Ein unmöglicher Streich?Ein unmoeglicher Streich[German] (1980) with Lyon Sprague de Camp
- Ein Yankee bei Aristoteles [German] (1980) with Lyon Sprague de Camp
-
Ein Zehncentstück bringt Erfolg?Ein Zehncentstueck bringt Erfolg[German] (1982) with Lyon Sprague de Camp and Fletcher Pratt
- Eine Frage der Gewohnheit [German] (1980) with Lyon Sprague de Camp
- El ojo de Tandyla [Spanish] (1951)
- Elephas Frumenti (1950) with Fletcher Pratt
- Elephas frumenti [German] (1982) with Lyon Sprague de Camp and Fletcher Pratt
- Employment (1939)
- Employment (1939) with Lyman R. Lyon
- Energiekrise [German] (1980) with Lyon Sprague de Camp
- Eudoric's Unicorn (1977)
- Eudorics Einhorn [German] (1981)
- Eudorics Einhorn [German] (1985)
- Falchi su Shem [Italian] (1998) with Robert E. Howard
- Far Babylon (1976)
- Finis [French] (2009) with Lyon Sprague de Camp
- Finished (1949)
- Flamkniven [Swedish] (1990) with Robert E. Howard
- Fossili Viventi [Italian] (2001)
- Frostjättens dotter [Swedish] (1987) with Robert E. Howard
-
Fünfhundert-Kilo-Kerle?Fuenfhundert-Kilo-Kerle[German] (1974)
- Gavagan's Bar (1950) with Fletcher Pratt
- Getaway on Krishna (1951)
- Gigantantropus [Italian] (1964)
- Gin Comes in Bottles (1953) with Fletcher Pratt
- Gin kommt in Flaschen [German] (1982) with Lyon Sprague de Camp and Fletcher Pratt
- Git Along! (1950)
- Glocke, Buch und Kerze [German] (1982) with Lyon Sprague de Camp and Fletcher Pratt
-
Glückliche Reise?Glueckliche Reise[German] (1981)
- Gratitude (1955)
- Hawks Over Shem (1955) with Robert E. Howard
- Here, Putzi! (1953) with Fletcher Pratt
- Heretic in a Balloon (1977)
- Het complot van de diercrackers [Dutch] (1977)
- Het ding in de graftombe [Dutch] (2003) with Robert E. Howard
- Het Hol van de Vampierslang [Dutch] (1983) with Lin Carter
- Het tapijt en de stier [Dutch] (1980)
- Het ultrasonisch fluitje [Dutch] (1977)
- Het Vlammende Mes [Dutch] (1983) with Robert E. Howard
- Hierher, Putzi! [German] (1982) with Lyon Sprague de Camp and Fletcher Pratt
- Hyperpelositus [German] (1978) with Lyon Sprague de Camp
- Hyperpelosity (1938)
-
Hyperpilositis [Russian] (1992)
with
Лайон Спрэг де Камп?Layon Spreg de Kamp
Lyon Sprague de Camp - Hyperpilosity (1938)
-
Hyperpilosität?Hyperpilositaet[German] (1981)
- Hökar över Shem [Swedish] (1989) with Robert E. Howard
- Ich vernahm eine Stimme [German] (1982) with Lyon Sprague de Camp and Fletcher Pratt
- Il Fischietto Di Galton [Italian] (2000)
- Il gioiello nella torre [Italian] (1980) with Lin Carter
- Il menhir [Italian] (1997)
- Il muro dei serpenti [Italian] (1965) with Fletcher Pratt
- Il muro dei serpenti [Italian] (1975) with Fletcher Pratt
-
Il Popolo della Vetta [Italian] (1980)
with
Björn Nyberg?Bjoern Nyberg
- Im Bann der Mathe-Magie [German] (1974) with Fletcher Pratt
- Im Land der Geister [German] (1982) with Lin Carter
- Im Saal der Toten [German] (1970) with Robert E. Howard
- Impractical Joke (1956)
- In den Dschungeln der Urzeit [German] (1958)
- In der Halle der Toten [German] (1982) with Robert E. Howard
- In-Group (1952)
- Innere Verbrennung [German] (1987) with Lyon Sprague de Camp
- Internal Combustion (1956)
- Invaders from Nowhere (1941)
- Inverse Variations (1940)
- Isormens håla [Swedish] (1987) with Lin Carter
- Jacht op Groot Wild [Dutch] (1978)
- Johannisnacht [German] (1982) with Lyon Sprague de Camp and Fletcher Pratt
- Ju-Group [German] (1980) with Lyon Sprague de Camp
- Judgment Day (1955)
- Juice (1940)
- Ka il terribile [Italian] (1996)
- Ka the Appalling (1958)
- Ka, der Schreckliche [German] (1978)
-
Kein Steak von heiligen Kühen?Kein Steak von heiligen Kuehen[German] (1978) with Lyon Sprague de Camp
- Keine Nachsendeadresse [German] (1982) with Lyon Sprague de Camp and Fletcher Pratt
- Kletba monolitu [Czech] (2004) with Lin Carter
- KOB & Co. [German] (1982)
-
Krví zbrocený bůh?Krvi zbroceny buh[Czech] (2004) with Robert E. Howard
-
Kâ le Terrifiant?Ka le Terrifiant[French] (1977)
- L'albero della gratitudine [Italian] (1964)
- L'exalté [French] (1965)
- L'homme tortu [French] (1984)
- L'incorrigible [French] (1973)
- L'interesse della scienza [Italian] (1964)
- L'ospite è sacro [Italian] (1964)
- L'unicorno di Eudoric [Italian] (1994)
- L'uomo nodoso [Italian] (2006)
-
L'étoile de Khorala [French] (1983)
with
Björn Nyberg?Bjoern Nyberg
-
L'œil de Tandyla?L'oeil de Tandyla[French] (1969)
-
L'œil de Tandyla?L'oeil de Tandyla[French] (1971)
- La chambre des morts [French] (1972) with Robert E. Howard
- La chose dans la crypte [French] (1972) with Lin Carter
- La cité des crânes [French] (1972) with Lin Carter
- La cité des crânes [French] (1998) with Lin Carter and Robert E. Howard
- La dea d'avorio [Italian] (1980) with Lin Carter
- La déesse d'ivoire [French] (1983) with Lin Carter
- La figlia del gigante del gelo [Italian] (2016) with Robert E. Howard
- La figlia del gigante del gelo [Italian] (2023) with Robert E. Howard
- La gemme dans la tour [French] (1983) with Lin Carter
- La girafe bleue [French] (1954)
- La giraffa azzurra [Italian] (1952)
- La giraffa blu [Italian] (2007)
- La lampada di Atlantide [Italian] (1992)
- La legione dei morti [Italian] (1980) with Lin Carter
- La lune rouge de Zembabwei [French] (1983) with Lin Carter
-
La malédiction du monolithe?La malediction du monolithe[French] (1982) with Lin Carter
- La malédiction du monolithe [French] (1998) with Lin Carter and Robert E. Howard
- La petite couronne [French] (1977)
- La pile de bois dur [French] (1977)
- La route des aigles [French] (1982) with Robert E. Howard
- La sorcière des brumes [French] (1983) with Lin Carter
-
La Stella di Khorala [Italian] (1980)
with
Björn Nyberg?Bjoern Nyberg
- La vierge et la licorne [French] (1982) with Lyon Sprague de Camp
- La vouivrerie [French] (1961)
- Lampan [Swedish] (1976)
- Larmes noires [French] (1982) with Lin Carter
- Larmes noires [French] (1998) with Lin Carter and Robert E. Howard
-
Le château de la terreur?Le chateau de la terreur[French] (1982) with Lin Carter
- Le château de la terreur [French] (1998) with Lin Carter and Robert E. Howard
-
Le dieu maculé de sang?Le dieu macule de sang[French] (1985) with Robert E. Howard
- Le dieu taché de sang [French] (1982) with Robert E. Howard
-
Le groin dans les ténèbres?Le groin dans les tenebres[French] (1982) with Lin Carter and Robert E. Howard
- Le kriss [French] (1982) with Robert E. Howard
- Le menhir [French] (1977)
-
Le peuple des cîmes [French] (1983)
with
Björn Nyberg?Bjoern Nyberg
- Le repaire du ver des glaces [French] (1982) with Lin Carter
- Le repaire du ver des glaces [French] (1998) with Lin Carter and Robert E. Howard
- Le sphinx noir de Nebthu [French] (1983) with Lin Carter
- Le streghe di Manhattan [Italian] (2021) with Lyon Sprague de Camp
- Le trésor de Tranicos [French] (1982) with Robert E. Howard
- Legion der Toten [German] (1982) with Lin Carter
- Legions of the Dead (1978) with Lin Carter
-
Les fantômes de Melvin Pye?Les fantomes de Melvin Pye[French] (1977)
- Les jardiniers imprudents [French] (1955)
- Les légions de la mort [French] (1983) with Lin Carter
- Les ptérodactyles mauves [French] (1977)
- Les tambours de Tombalku [French] (1972) with Robert E. Howard
- Let's Have Fun (1957)
- Living Fossil (1939)
- Luna di sangue [Italian] (1980) with Lin Carter
- Lune de sang [French] (1983) with Lin Carter
- M. Incendiaire [French] (1977)
-
Machen wir doch ein Faß auf!?Machen wir doch ein Fass auf![German] (1980) with Lyon Sprague de Camp
-
Man könnte ein Vermögen damit verdienen?Man koennte ein Vermoegen damit verdienen[German] (1982) with Lyon Sprague de Camp and Fletcher Pratt
- Medizinmann wider Willen [German] (1979)
-
Meines Bruders Hüter?Meines Bruders Hueter[German] (1982) with Lyon Sprague de Camp and Fletcher Pratt
- Methought I Heard a Voice (1951) with Fletcher Pratt
- Miocene Romance (1993)
- Monolitens förbannelse [Swedish] (1987) with Lin Carter
- Moon of Blood (1978) with Lin Carter
- More Than Skin Deep (1951) with Fletcher Pratt
- Moto-contínuo [Portuguese] (1977)
- Mouvement perpétuel [French] (2009) with Lyon Sprague de Camp
- Movable Ears (1943)
- Mr. Arson (1941)
- My Brother's Keeper (1953) with Fletcher Pratt
- Ne chasse pas qui veut le dinosaure [French] (1956)
- Neu-Arkadien [German] (1980) with Lyon Sprague de Camp
- New Arcadia (1956)
-
Nicht nur oberflächlich?Nicht nur oberflaechlich[German] (1982) with Lyon Sprague de Camp and Fletcher Pratt
- Nichts als Schlangen [German] (1981)
- No Forwarding Address (1953) with Fletcher Pratt
- Non vietato dal regolamento [Italian] (2000)
- Nothing in the Rules (1939)
- O apito de Galton [Portuguese] (1976)
- O Homem Amarelo [Portuguese] (unknown)
- O olho de Tandyla [Portuguese] (1990)
- Oh, Say! Can You See (1959) with Fletcher Pratt
- Ombre dans un crâne [French] (1983) with Lin Carter
- Ombre nel buio [Italian] (1980) with Lin Carter
- Ombres dans la nuit [French] (1983) with Lin Carter
- One Man's Meat (1953) with Fletcher Pratt
- Opschudding in het MacDonaldhuis [Dutch] (1986)
- Os dentes do inspector [Portuguese] (1976)
- Os isolinguais [Portuguese] (1971)
- Perpetual Motion (1950)
- Perpetuum mobile [Dutch] (1977)
- Perpetuum Mobile [German] (1991)
- Pliocene Romance (1993)
- Possession (1955)
- Preface (Tales from Gavagan's Bar) (1953) with Fletcher Pratt
- Priapus (1977)
- Priapus [German] (1982)
- Property of Venus (1955)
- Proposal (1952)
- Pterodactilii purpurii [Romanian] (1986) with Sprague de Camp
- Pterodattili viola [Italian] (1988)
- Red Moon of Zembabwei (1974) with Lin Carter
- Retirement (1940)
-
Rien dans le règlement?Rien dans le reglement[French] (1977)
- Rogue Princess (1952)
-
Rypák v temnotách?Rypak v temnotach[Czech] (2004) with Lin Carter and Robert E. Howard
-
Rückfall?Rueckfall[German] (1980) with Lyon Sprague de Camp
- Sag, siehst du dort ... [German] (1982) with Lyon Sprague de Camp and Fletcher Pratt
- Sagesse orientale [French] (1977)
- Saurierjagd im Mesozoikum [German] (1980) with Lyon Sprague de Camp
- Schatten in der Finsternis [German] (1982) with Lin Carter
- Schlangengaben [German] (1982)
- Shadows in the Dark (1978) with Lin Carter
- Shadows in the Skull (1975) with Lin Carter
- Sir Harold and the Gnome King (1990)
- Sir Harold E Il Re Degli Gnomi [Italian] (2000)
- Sir Harold of Zodanga (1995)
- Six Scenes in Search of an Illustration (1963) with Dick Eney and Fritz Leiber and Katherine MacLean and Michael Moorcock and John Pocsik
- Six Scenes in Search of an Illustration (1963) with Richard Eney and Fritz Leiber and Katherine MacLean and Michael Moorcock and John Pocsik
- Some Curious Effects of Time Travel (1942)
- Sommermoden [German] (1959)
- Spider Love (1977)
- Summer Wear (1950)
- Svarta tårar [Swedish] (1990) with Lin Carter
-
Síň mrtvých?Sin mrtvych[Czech] (2004) with Robert E. Howard
- Tandylas øye [Norwegian (Bokmal)] (1973)
- The Ancestral Amethyst (1952) with Fletcher Pratt
- The Anecdote of the Movable Ears (1943)
- The Anecdote of the Negative Wugug (1942)
- The Animal-Cracker Plot (1949)
- The Bear Who Saved the World (1977) with Catherine Crook de Camp
- The Best Laid Scheme (1941)
- The Best-Laid Scheme (1941)
- The Better Mousetrap (1950) with Fletcher Pratt
- The Big Splash (1992)
- The Black Ball (1952) with Fletcher Pratt
- The Black Stranger (1953) with Robert E. Howard
- The Blood-Stained God (1955) with Robert E. Howard
- The Bloodstained God (1956) with Robert E. Howard
- The Blue Giraffe (1939)
- The Blunderer (1952)
- The Castle of Iron (1941) with Fletcher Pratt
- The Castle of Terror (1969) with Lin Carter
- The Cayuse (1993)
- The City of Skulls (1967) with Lin Carter
- The Colorful Character (1949)
- The Command (1938)
- The Continent Makers (1951)
- The Contraband Cow (1942)
- The Coronet (1976)
- The Curse of the Monolith (1968) with Lin Carter
- The Effects of Time Travel (1942)
- The Egg (1956)
- The Emancipated (1940)
- The Emperor's Fan (1973)
- The Eve of St. John (1953) with Fletcher Pratt
- The Exalted (1940)
- The Exhalted (1940)
- The Eye of Tandyla (1951)
- The Figurine (1977)
- The Flame Knife (1955) with Robert E. Howard
- The Frost Giant's Daughter (1953) with Robert E. Howard
- The Frost Giant's Daughter (1969) with Robert E. Howard
- The Frost Giant's Daughter (Gods of the North) (2017) with Robert E. Howard
- The Frost-Giant's Daughter (1953) with Robert E. Howard
- The Galton Whistle (1951)
- The Gem in the Tower (1978) with Lin Carter
- The Ghosts of Melvin Pye (1946)
- The Gift of God (1950) with Fletcher Pratt
- The Gnarly Man (1939)
- The Green Magician (1954) with Fletcher Pratt
- The Green Magician (2013)
- The Green Thumb (1953) with Fletcher Pratt
- The Guided Man (1952)
- The Hairless Ones Come (1939)
- The Hall of the Dead (1967) with Robert E. Howard
- The Hand of Zei (excerpt) (1982)
- The Hardwood Pile (1940)
- The Hibited Man (1949)
- The Honeymoon Dragon (1993)
- The Hungry Hercynian (1953)
- The Huns (1978)
- The Incomplete Enchanter (excerpt) (1942) with Fletcher Pratt
- The Incorrigible (1939)
- The Inspector's Teeth (1950)
- The Isolinguals (1937)
- The Ivory Goddess (1978) with Lin Carter
- The Lair of the Ice Worm (1969) with Lin Carter
- The Lamp (1975)
- The Lamp from Atlantis (1975)
- The Last Drop (1941) with L. Ron Hubbard
- The Last Drop (1941) with L. Ron Hubbard
- The Love Nest (1953) with Fletcher Pratt
- The Lusts of Professor Adams (1972)
- The Mathematics of Magic (1940) with Fletcher Pratt
- The Mathematics of Magic (2013)
- The Menhir (1977)
- The Merman (1938)
- The Mislaid Mastodon (1993)
- The Negative Wugug (1942)
- The Ordeal of Professor Klein (1952)
- The Owl and the Ape (1951)
- The Palimpsest of St. Augustine (1953) with Fletcher Pratt
-
The People of the Summit (1978)
with
Björn Nyberg?Bjoern Nyberg
- The Purple Pterodactyls (1976)
- The Rape of the Lock (1952) with Fletcher Pratt
- The Reluctant Shaman (1947)
- The Road of the Eagles (1955) with Robert E. Howard
- The Roaring Trumpet (1940) with Fletcher Pratt
- The Roaring Trumpet (2013)
- The Round-Eyed Barbarians (1992)
- The Rug and the Bull (1973)
- The Satanic Illusion (1992)
- The Saxon Pretender (1952)
- The Snout in the Dark (1969) with Lin Carter and Robert E. Howard
- The Soaring Statue (1952)
- The Space Clause (1952)
-
The Star of Khorala (1978)
with
Björn Nyberg?Bjoern Nyberg
- The Stolen Dormouse (1941)
- The Stone of the Sages (1953) with Fletcher Pratt
- The Stone of the Witch-Queen (1977)
- The Stronger Spell (1953)
- The Synthetic Barbarian (1992)
- The Thing in the Crypt (1967) with Lin Carter
- The Treasure of Tranicos (1953) with Robert E. Howard
- The Treasure of Tranicos (1953) with Robert E. Howard
- The Untimely Toper (1953) with Fletcher Pratt
- The Untimely Toper: A Gavagan's Bar story (1953) with Fletcher Pratt
- The Virgin of Zesh (1953)
- The Wall of Serpents (1953) with Fletcher Pratt
- The Wall of Serpents (2013)
- The Warrior Race (1940)
- The Weissenbroch Spectacles (1954) with Fletcher Pratt
- The Wheels of If (1940)
- The Wisdom of the East (1942)
- The Witch of the Mists (1972) with Lin Carter
- The Witches of Manhattan (1978)
- The Yellow Man (1978)
- There'd Be Thousands in It (1978) with Fletcher Pratt
- Throwback (1949)
- Tiki (1977)
- Tiki [French] (1977)
- Tiki [German] (1982)
- Tiki [Italian] (1991)
- Tombalkus trummor [Swedish] (1990) with Robert E. Howard
- Traje de Verão [Portuguese] (1976)
- Tranicos skatt [Swedish] (1991) with Robert E. Howard
- Tritonen [German] (1978) with Lyon Sprague de Camp
- Trynet i mörkret [Swedish] (1987) with Lin Carter and Robert E. Howard
- Two Yards of Dragon (1976)
- Ultrasonic God (1951)
- Un don de dieu [French] (1954) with Fletcher Pratt
- Un fameux cordon-bleu ! [French] (1955) with Fletcher Pratt
- Un Fucile Da Dinosauri [Italian] (2001)
-
Un mec préhisto?Un mec prehisto[French] (1976)
- Una notte a Providence [Italian] (1990)
- United Imp (1977)
- Vam'bora [Portuguese] (1976)
- Varelsen i gravvalvet [Swedish] (1987) with uncredited
- Vargar bortom gränsen [Swedish] (1991) with Robert E. Howard
- Vier Ellen Drachenhaut [German] (1978)
- Vort sik! [Dutch] (1977)
- Vorwort (Geschichten aus Gavagans Bar ) [German] (1982) with Fletcher Pratt
-
Věc v kryptě?Vec v krypte[Czech] (2004) with Lin Carter
- Wall of Serpents (1972) with Fletcher Pratt
- Ward of the Argonaut (1959) with Fletcher Pratt
- When the Night Wind Howls (1951) with Fletcher Pratt
- Where to, Please? (1952) with Fletcher Pratt
- Wide-Open Planet (1950)
- Wohin, bitte? [German] (1982) with Lyon Sprague de Camp and Fletcher Pratt
- Wolves Beyond the Border (1967) with Robert E. Howard
- Wyvernhold (1956)
-
Wölfe jenseits der Grenze?Woelfe jenseits der Grenze[German] (1971) with Robert E. Howard
-
Wölfe jenseits der Grenze?Woelfe jenseits der Grenze[German] (1984) with Lyon Sprague de Camp and Robert E. Howard
- Ymir leánya [Hungarian] (1992) with Robert E. Howard
- Ymirs Tochter [German] (1982) with Robert E. Howard
- Zomerkleren [Dutch] (1977)
- Zwarte Tranen [Dutch] (1983) with Lin Carter
-
Zámek hrůzy?Zamek hruzy[Czech] (2004) with Lin Carter
- Örnarnas stig [Swedish] (1989) with Robert E. Howard
-
Барабаните на Томбалку?Barabanite na Tombalku[Bulgarian] (1997) withРобърт Е. Хауърд?Robart E. Hauard
-
Вещицата на мъглите?Veshtitsata na maglite[Bulgarian] (1997) withЛ. Спрег де Камп?L. Spreg de KampandЛин Картър?Lin Kartar
-
Вълци отвъд границата?Valtsi otvad granitsata[Bulgarian] (1998) withРобърт Е. Хауърд?Robart E. Hauard
-
Градът на черепите?Gradat na cherepite[Bulgarian] (1991) withЛин Картър?Lin KartarandЛ. Спрег Де Камп?L. Spreg De Kamp
-
Дъщерята на ледения гигант?Dashteryata na ledeniya gigant[Bulgarian] (2016) withРобърт Хауърд?Robart Hauard
-
Дъщерята на студа?Dashteryata na studa[Bulgarian] (1991) withРобърт Хауърд?Robart Hauard
-
Залата на мъртъвците?Zalata na martavtsite[Bulgarian] (1991) withРобърт Хауърд?Robart HauardandЛ. Спрег Де Камп?L. Spreg De Kamp
-
Нещото в гробницата?Neshtoto v grobnitsata[Bulgarian] (1991) withЛин Картър?Lin KartarandЛ. Спрег Де Камп?L. Spreg De Kamp
-
Огненият кинжал?Ogneniyat kinzhal[Bulgarian] (1998) withЛ. Спрег де Камп?L. Spreg de KampandРобърт Е. Хауърд?Robart E. Hauard
-
С ружьём на динозавра?S ruzh'yom na dinozarva[Russian] (1970) withЛ. Спрэг де Камп?L. Spreg de Kamp
-
Сенки в черепа?Senki v cherepa[Bulgarian] (1997) withЛ. Спрег де Камп?L. Spreg de KampandЛин Картър?Lin Kartar
-
Съкровището на Траникос?Sakrovishteto na Tranikos[Bulgarian] (1998) withРобърт Е. Хауърд?Robart E. Hauard
-
Червената луна на Зимбабве?Chervenata luna na Zimbabve[Bulgarian] (1997) withЛ. Спрег де Камп?L. Spreg de KampandЛин Картър?Lin Kartar
-
Черни сълзи?Cherni salzi[Bulgarian] (1998) withЛ. Спрег де Камп?L. Spreg de KampandЛин Картър?Lin Kartar
-
Черният странник?Cherniyat strannik[Bulgarian] (2016) withРобърт Хауърд?Robart Hauard
-
Черният сфинкс на Небту?Cherniyat sfinks na Nebtu[Bulgarian] (1997) withЛ. Спрег де Камп?L. Spreg de KampandЛин Картър?Lin Kartar
- ›Die Teufelskunst-Union‹ [German] (1979)
-
恐竜狩り?きょうりゅうかり[Japanese] (2013) with
Kyōryū Kari
Kyōryū KariL・スプレイグ・ディ・キャンプ?L. Supureigu Di Kyanpu
- "Reward of Virtue" (1978)
- "The Ameba" (1973)
- "The Little Green Men" (1978)
- A Brook in Vermont (1969)
- A Caution (1976)
- A Glass of Goblanti (1972)
- A Night Club in Cairo (1972)
- A Skald's Lament (1955)
- A Tale of Two John Carters (1969)
- Acrophobia (1968)
- African Night (1972)
- Art (1972)
- Atavism (1976)
- Avebury (1970)
- Babylon (1976)
- Bear on a Bicycle (1971)
- Beholder (1972)
- Bourzi (1972)
- Carnac (1969)
- Conan the Limmerian (1978)
- Creation (1970)
- Daydreams (1969)
- Delray Beach, Florida (1972)
- Disillusion (1970)
- Envy (1968)
- Farewell to Adam (1970)
- Faunas (1968)
- Fiction (1975)
- First Lake at Midnight (1970)
- Flying Fish (1977)
- Ghost Ships (1968)
- Ghosts (1969)
- Glamour (1972)
- Gratuity (1976)
- Happiness (1974)
- Heldendämmerung (1964)
- Heroes (1967)
- Houses on Stalks (1974)
- Ivan Vasilevitch (1973)
- Jewels (1972)
- Jorian's Jingles: On a Shrew (1972)
- Jorian's Jingles: On Battle (1972)
- Jorian's Jingles: On Death (1972)
- Jorian's Jingles: On Executioners (1972)
- Jorian's Jingles: On Himself (1972)
- Jorian's Jingles: On his Homeland (1972)
- Jorian's Jingles: On Magic (1972)
- Jorian's Jingles: On Piracy (1972)
- Jorian's Jingles: On Polygamy (1972)
- Kaziranga, Assam (1967)
- Lament by a Maker (1955)
- Leaves (1972)
- Limerick (Amra V2n39, March 1966) (1966)
- Lohn ritterlicher Tugend [German] (1981)
- Magus Imperitus (1973)
- Merlin (1974)
- Meroê (1967)
- Mother and Son (1971)
- My Carrack (1979)
- My Uglies (1976)
- Nabonidus (1965)
- Nahr al-Kalb (1967)
- New Year's Eve in Baghdad (1968)
- Night (1968)
- Old Heroes (1967)
- Other Limericks (Amra V2n51, November 1969) (1969) with John Boardman and Robert Coulson and Dennis Lien
- Other Limericks (Amra V2n51, November 1969) (1969) with John Boardman and Buck Coulson and L. S. de Camp and Dennis Lien
- Où Sont les Planètes d'Antan? (1967)
- Parodies Tossed: With Reverent Apologies to the Shade of Sir William Gilbert - All the Latest Improvements (1957)
- Patnâ (1970)
- Preferences (1972)
- Progress (1977)
- Progress in Baghdad (1969)
- Psyche (1972)
- Reward of Virtue (1970)
- Ripples (1980)
- Ruins (1970)
- Shadows Over Squamous (1976)
- Sirrush (1959)
- Souls (1981)
- Spells (1977)
- Spring (1972)
- Tars Tarkas & I (1975)
- Tars Tarkas and I (1975)
- Tehuantapec (1972)
- Tehuantepec (1972)
- Teotihuacán (1970)
- The Ameba (1973)
- The Barbarian (1976)
- The Bats of Florence (1981)
- The Dome of the Rock (1981)
- The Dragon-Kings (1968)
- The Dragon-Slayers (1974)
- The Elephant (1972)
- The Enchanted Isles (1978)
- The End of the Lost-Race Story (1970)
- The Fossils (1975)
- The Galápagos Marine Iguana (1981)
- The Ghost (1968)
- The Ghost of H.P.L. (1973)
- The Gods (1966)
- The Great Pyramid (1970)
- The Great Pyramid of Giza (1970)
- The Hippopotamus (1972)
- The Home of the Gods (1972)
- The Indian Rhinoceros (1967)
- The Irish (1972)
- The Iron Pillar of Delhi (1972)
- The Jungle Vine (1968)
- The Little Green Men (1976)
- The Little Lion of Font-de-Gaume (1970)
- The Lizards of Tula (1972)
- The Mantis (1972)
- The Megaliths of Avebury (1981)
- The Newt (1972)
- The Octopus (1975)
- The Ogre (1968)
- The Old-Fashioned Lover (1972)
- The Olmec (1972)
- The Opossum (1976)
- The Other Baghdad (1972)
- The Quatrains of Bessas the Bactrian (1970)
- The Reaper (1972)
- The Saviors (1971)
- The Sorcerers (1970)
- The Trap (1972)
- The Tusk (1967)
- Thoth-Amon's Complaint (1972)
- Tiger in the Rain (1970)
- Tikal (1965)
- Time (1967)
- Tintagel (1967)
- To My Library (1969)
- To R.E.H. (1967)
- Transposition (1963)
- Warriors (1968)
- Wayfarers (1974)
- Where Are the Worlds of Yesteryear? (1967)
- Xeroxing the "Necronomicon" (2000)
- Xeroxing the Necronomicon (1972)
- Yuggoth Comes to Providence (1973)
- Ziggurat (1969)
- "There Ain't No Such!" (Part 1 of 2) (1939)
- "There Ain't No Such!" (Part 2 of 2) (1939)
- - - - And Having Writ - - - (1969) with Frank Kelly Freas
- 18th World Knowledge Sagas Forgathering (1961) with Poul Anderson
- [John W. Campbell Appreciation] (1971)
- A Far-Fetched Scroll (1967)
- A Modern Merlin (1953)
- A Puzzle (1962)
- A Sword Scroll (1966)
- A Sword Scroll (1966) with L. S. de Camp
- A távola redonda de um hectare [Portuguese] (1971)
- A Visit to a Royal Historian (1991)
- A Word of Explanation (1972)
- Addenda to the Exegesis (1966)
- Addendum (The Swords of Zinjaban) (1991) with Catherine Crook de Camp
- Afterword: Fletcher and I (1975)
- An Exegesis of Howard's Hyborian Tales (1959)
- An Exegesis of Howard's Hyborian Tales - Part 3 (1959)
- An Exegesis of Howard's Hyborian Tales - Part II (1959)
- An Exegesis of Names Discarded by REH (1969)
- An Informal Biography of Conan the Cimmerian (1959) with John D. Clark, Ph.D. and P. Schuyler Miller
- An Informal Biography of Conan the Cimmerian (1959) with John D. Clark and P. Schuyler Miller
- An Informal Biography of Conan the Cimmerian (1959) with Dr. John D. Clark and P. Schuyler Miller
- Anmerkung des Autors (Das Orakel der Fremden) [German] (1978) with Lyon Sprague de Camp
- Another Scroll (1982)
- Aphorisms (1972)
- Apollonios Enlists (1961)
- Appendix A: Young Man Lovecraft (1978)
- Appius Claudius Crassus (1983)
- Appius Claudius Crassus: Roman Builder (1962)
- Arthor, Author: L. Sprague de Camp (1951)
- As quedas de Tróia [Portuguese] (1971)
- Atlantis and the City of Silver (1981) with Catherine Crook de Camp
- August Derleth 1909-1971 (1971)
- Author's Afterword (Rivers of Time) (1993)
- Author's Afterword (The Best of L. Sprague de Camp) (1978)
- Author's Note (Lest Darkness Fall) (1941)
- Author's Note (Rogue Queen) (1951)
- Author's Note (The Bones of Zora) (1984)
- Author's Note (The Bronze God of Rhodes) (1960)
- Author's Note (The Clocks of Iraz) (1971)
- Author's Note (The Continent Makers and Other Tales of the Viagens) (1953)
- Author's Note (The Dragon of the Ishtar Gate) (1961)
- Author's Note (The Tritonian Ring) (1951)
- Author, Author: L. Sprague de Camp (2005) with Donald B. Day
- Barbarians I Have Known (1973)
- Beasts, Birds, & Creeping Things (1981)
- Bibliotechnical Bonanza (1966)
- Biography (1978)
- Book Review (Astounding, April 1950) (1950)
- Book Review (Astounding, February 1948) (1948)
- Book Review (Astounding, January 1940) (1940)
- Book Review (Astounding, June 1942) (1942)
- Book Review (Astounding, June 1948) (1948) with Willy Ley
- Book Review (Astounding, November 1938) (1938)
- Book Review (Astounding, September 1950) (1950)
- Book Review (Unknown Worlds, February 1942) (1942)
- Book Review (Unknown Worlds, February 1942) (1942) with J. Wellington Wells
- Book Reviews (Astounding, August 1941) (1941)
- Book Reviews (Astounding, August 1950) (1950) with P. Schuyler Miller
- Book Reviews (Astounding, February 1951) (1951) with P. Schuyler Miller
- Book Reviews (Astounding, June 1951) (1951) with P. Schuyler Miller
- Book Reviews (Astounding, May 1949) (1949) with P. Schuyler Miller
- Book Reviews (Astounding, May 1950) (1950) with P. Schuyler Miller
- Book Reviews (Astounding, November 1950) (1950) with P. Schuyler Miller
- Books That Never Were (1972)
- Brachiating in the Family Tree (1989)
- Bridey Murphy and the Martian Princess (1957)
- Bulletin Symposium (The Bulletin of the Science Fiction Writers of America, Spring 1988) (1988) with Poul Anderson and Gregory Benford and John Brunner and Arthur C. Clarke and Jack Dann and Catherine Crook de Camp and George Alec Effinger and Joe Haldeman and James Morrow and Larry Niven and John Shirley and Lawrence Watt-Evans and Connie Willis and Gene Wolfe and Jane Yolen
- Bulletin Symposium (The Bulletin of the Science Fiction Writers of America, Summer 1989) (1989) with Isaac Asimov and John Brunner and F. M. Busby and Suzy McKee Charnas and Arthur C. Clarke and Sheila Finch and Esther M. Friesner and James Morrow and Larry Niven and Frederik Pohl and Nancy Springer
- Bulletin Symposium (The Bulletin of the Science Fiction Writers of America, Winter 1985) (1985) with Brian W. Aldiss and Isaac Asimov and Michael Bishop and C. J. Cherryh and Arthur C. Clarke and Richard Cowper and Phyllis Eisenstein and Fritz Leiber and Anne McCaffrey and Andre Norton and Brian Stableford and Jack Williamson
- Bulletin Symposium (The Bulletin of the Science Fiction Writers of America, Winter 1985) (1985) with Brian Aldiss and Isaac Asimov and Michael Bishop and C. J. Cherryh and Arthur C. Clarke and Richard Cowper and Phyllis Eisenstein and Fritz Leiber and Anne McCaffrey and Andre Norton and Brian Stableford and Jack Williamson
- By and About (1978)
- Chariot Opera (1960)
- Combustión interna (introduction) [Spanish] (1986)
- Commentary (on Asimov's Foundation Trilogy) (1982)
- Conan & Pizarro (1964)
- Conan and Matho (1961)
- Conan and Pizarro (1964)
- Conan and Togetherness (1959)
- Conan of the Movies (1981)
- Conan the Barbarian: A Synopsis of the Ultimate Hero's Adventures (1983)
- Conan the Indestructible (1984)
-
Conan Undesexed (1961)
with
Björn Nyberg?Bjoern Nyberg
- Conan's Ghost (1968)
- Conan's Great-Grandfather (1961)
- Conan's Imitators (1962)
- Conan, Illusion, and Reality (1980)
- Conan: Illusion and Reality (1980)
- Conans Nachahmer [German] (1963)
-
Conans Urgroßvater?Conans Urgrossvater[German] (1963)
- Cope vs. Marsh (1969)
- Creatures Great and Small (1972)
- De barbaar als held [Dutch] (1979)
- De Camp Responds (1976)
- De Camp Responds (2008)
- De Camp's Page (1962)
- Death Comes to the Megafauna (1971)
- Design for Life (Part 1 of 2) (1939)
- Design for Life (Part 2 of 2) (1939)
- Die Conan-Saga [German] (1982)
- Die Krishna-Geschichten [German] (1963)
- Dinosauri Veri E Falsi (Part 1 of 2) [Italian] (1970)
- Dinosauri Veri E Falsi (Part 2 of 2) [Italian] (1970)
- Dinosaurs in Today's World (1968)
- Dinosaurs Today (1983)
- Doing Nothing Defined (2004)
- Down to Earth (Future Science Fiction, January 1952) (1952)
- Dragon Hunt (1963)
- Editing Conan (1968)
- Editor's Note (The Blade of Conan) (1979)
- Editor's Note (The Spell of Conan) (1980)
- Ein Vorwort (Wir sind Legende) [German] (1996) with Lyon Sprague de Camp
- Einleitung (Conan der Abenteurer) [German] (1983)
- Einleitung (Conan der Befreier) [German] (1982)
- Einleitung (Conan der Eroberer) [German] (1984)
- Einleitung (Conan der Krieger) [German] (1983)
- Einleitung (Conan der Pirat) [German] (1982)
-
Einleitung (Conan der Rächer)?Einleitung (Conan der Raecher)[German] (1984)
-
Einleitung (Conan der Thronräuber)?Einleitung (Conan der Thronraeuber)[German] (1984)
- Einleitung (Conan der Wanderer) [German] (1982)
- Einleitung (Conan von Cimmerien) [German] (1982)
- Einleitung (Conan von den Inseln) [German] (1984)
- Einleitung (Conan) [German] (1982)
- El-Ron & The City of Brass (1968)
- El-Ron and the City of Brass (1968)
- Erinnerungen an Robert E. Howard [German] (1982)
- Faery Lands Forlorn (1955)
- False Prophets Shall Rise (1952)
- Fletcher and I (1975)
- Foreword (Conan the Barbarian) (1982)
- Foreword (Heroes and Hobgoblinis) (1981)
- Foreword (Pathways to Elfland: The Writings of Lord Dunsany) (1989)
- Foreword (Phantoms & Fancies) (1972)
- Foreword (The Pixilated Peeress) (1991) with Catherine Crook de Camp
- Foreword (The Purple Pterodactyls) (1979)
- Foreword (The Queen of Zamba)(collection) (1977)
- Foreword (The Wheels of If) (1948)
- Foreword: Fletcher and I (1975)
- Fritz Leiber Appreciation (1992)
- Future Forum (Future, January 1979) (1979) with Poul Anderson and Marion Zimmer Bradley and Mark R. Chartrand, III and Larry Niven and George Pal and Joanna Russ and Charles H. Schneer and Bjo Trimble and Gahan Wilson
- Future Forum (Future, January 1979) (1979) with Poul Anderson and Marion Zimmer Bradley and Dr. Mark R. Chartrand and Larry Niven and George Pal and Joanna Russ and Charles H. Schneer and Bjo Trimble and Gahan Wilson
- Future Forum (Future, July 1978) (1978) with Forrest J. Ackerman and Poul Anderson and John Brunner and David Gerrold and Vic Ghidalia and Joe Haldeman and Ilya Salkind and Bjo Trimble
- Future Forum (Future, July 1978) (1978) with Forrest J. Ackerman and Poul Anderson and John Brunner and David Gerrold and Vic Ghidalia and Joe W. Haldeman and Ilya Salkind and Bjo Trimble
-
Geschichtenerzähler?Geschichtenerzaehler[German] (1987)
- Get Out and Get Under (Part 1) (1942)
- Get Out and Get Under (Part 2 of 2) (1943)
- Ghost Trouble (1980)
- Ghostly Note (1955)
- Glossary of Ormazdian Names and Words (1951)
- Goat Island (1993)
- Government Bug-Hunter (1972)
- H. P. Lovecraft and H. S. Chamberlain (1972)
- H. P. Lovecraft: Part2 Mosig vs de Camp Debate (1975) with Dirk W. Mosig
- H. P. Lovecraft: Part2 Mosig vs de Camp Debate (1975) with Dirk Mosig
- Henry Kuttner: An Introduction (Prince Raynor) (1987)
-
Heroic Fantasy: Eine Einführung?Heroic Fantasy: Eine Einfuehrung[German] (1988)
- Hoaxes in Science (1983)
- How to Hunt Dinosaurs (1968)
- How to Plan a Fauna (1963)
-
How to Plan a Fauna—?How to Plan a Fauna-(1964)
- How to Talk Futurian (1957)
- Howard and the Celts (1975)
- Howard and the Races (1977)
- Howard's Prototypes (1987)
- Humor in Science Fiction (1947)
- Hyborian Names (1978)
- Hyborian Technology (1963)
- Hyborische Technik [German] (1982)
- I nomi hyboriani [Italian] (1980)
- Ignatius Donelly Pseudomath (1957)
- Imaginative Fiction and Creative Imagination (1953)
- In Memoriam: Isaac Asimov (1920-1992) (Obit) (1992) with Karen Anderson and Poul Anderson and Isaac Asimov and Janet Asimov and Stanley Asimov and Ben Bova and Arthur C. Clarke and Joel Davis and Catherine Crook de Camp and Harlan Ellison and Martin H. Greenberg and Shawna McCarthy and Frederik Pohl and Carl Sagan and Stanley Schmidt and Robert Silverberg and Norman Spinrad and Sheila Williams and Connie Willis and Jane Yolen
- In Memorium: P. Schuyler Miller, 1912-1974 (1975) with Charles N. Brown and Dena Brown
- In Memorium: P. Schuyler Miller, 1912-1974 (1975) with Charles Brown and Dena Brown
- Inledning (Conan Cimmeriern) [Swedish] (1987)
- Inledning (Conan piraten) [Swedish] (1989)
- Inledning (Conan) [Swedish] (1987)
- Inleiding (De bouwers van het continent) [Dutch] (1977)
- Internal Combustion (introduction) (1984)
- Introducción (Conan y el dios araña) [Spanish] (1997)
- Introduction (A Catalog of Lovecraftiana: The Grill/Binkin Collection) (1975)
- Introduction (At the Earth's Core / A Princess of Mars) (1996)
- Introduction (Blond Barbarians & Noble Savages) (1975)
- Introduction (Conan and the Spider God) (1980)
- Introduction (Conan l'aquilonien) [French] (1983)
- Introduction (Conan l'explorateur) [French] (1983) with Sprague de Camp
- Introduction (Conan l'usurpateur) [French] (1982)
-
Introduction (Conan le Cimmérien)?Introduction (Conan le Cimmerien)[French] (1982)
- Introduction (Conan le conquérant) [French] (1980)
- Introduction (Conan le flibustier) [French] (1982)
- Introduction (Conan le justicier) [French] (1983)
- Introduction (Conan le libérateur) [French] (1983)
- Introduction (Conan le vagabond) [French] (1982)
- Introduction (Conan le vengeur) [French] (1983)
- Introduction (Conan of Aquilonia) (1977)
- Introduction (Conan of Cimmeria) (1969)
- Introduction (Conan of the Isles) (1968)
- Introduction (Conan the Adventurer) (1966)
- Introduction (Conan the Avenger) (1968)
- Introduction (Conan the Conqueror) (1967)
- Introduction (Conan the Freebooter) (1968)
- Introduction (Conan the Liberator) (1979)
- Introduction (Conan the Usurper) (1967)
- Introduction (Conan the Wanderer) (1968)
- Introduction (Conan the Warrior) (1967)
- Introduction (Conan) (1967)
- Introduction (Conan) [French] (1972)
- Introduction (King Conan) (1953)
- Introduction (Marching Sands) (1974)
- Introduction (Rubber Dinosaurs and Wooden Elephants) (1996)
- introduction (The Coming of Conan) (1953)
- Introduction (The Emperor's Fan) (1973)
- Introduction (The Lost Continent) (1974)
- Introduction (The Miscast Barbarian) (1975)
- Introduction (The Swords of Zinjaban) (1991) with Catherine Crook de Camp
- Introduction (The Treasure of Tranicos) (1980)
- Introduction (The Wolf Leader) (1950)
- Introduction (To Quebec and the Stars) (1976)
- Introduction (Warlocks and Warriors) (1970)
- Introduction (We Are All Legends) (1981)
- Introduction to "The Ancestral Amethyst" (1980)
- Introduction to "The Isolinguals" (2003)
- Introduction to Proposal (1968)
- Introduction to the Lancer Books Edition (Conan the Freebooter) (1976)
- Introduction-Beyond the World We Know (1972) with Catherine Crook de Camp
- Introduction: Heroic Fantasy (1963)
- Introduction: Wizards and Warriors (1965)
- Introduction: Yesterday, Tomorrow, and Maybe (1973) with Catherine Crook de Camp
- Introduktion (Conan förgöraren) [Swedish] (1990)
- Introduktion (Conan härskaren) [Swedish] (1991)
- Introduktion (Conan krigaren) [Swedish] (1991)
- Introduktion (Conan segraren) [Swedish] (1991)
- Introduktion (Conan äventyraren) [Swedish] (1990)
- Introduzione (Conan e il Dio-ragno) [Italian] (1985)
- Introduzione (Conan il liberatore) [Italian] (1981)
- Isaac and I (1992)
- Isaac Asimov (1966)
- It Ool Depend (1953)
- J. R. R. Tolkien (appreciation) (1973)
- John D. ("Doc") Clark (1988)
- Justinian Jugg's Patent (1940)
- Knight and Knaves in Neustria (1968)
- Knights & Kaves in Neustria (1966)
- Knights and Knaves in Neustria (1966)
- Kush (1960)
- L. Sprague de Camp Bibliographie [German] (1963) with Franz Rottensteiner
- La plus vieille profession (I) [French] (1962)
- La saga di Conan [Italian] (1980)
- Lands of Yesterday (1950)
- Language for Time Travelers (1938)
- Le mystère des ruines bleues de Nan Matal [French] (1965) with Catherine Crook de Camp
- Le mystère des ruines bleues de Nan Matal [French] (1965) with C. Sprague de Camp
- Letter (Amazing Stories, April 1931) (1939)
- Letter (Analog, April 1985) (1985)
- Letter (Analog, December 1982) (1982)
- Letter (Analog, February 1971) (1971)
- Letter (Analog, February 1990) (1990)
- Letter (Analog, February 1990) (Answers to questions by Joseph F. Hull and Don Barshay) (1990)
- Letter (Analog, February 1990) [2] (1990)
- Letter (Analog, July 1967) (1967)
- Letter (Analog, March 1989) (1989)
- Letter (Analog, May 1988) (1988)
- Letter (Analog, October 1969) (1969)
- Letter (Analog, October 1987) (1987)
- Letter (Asimov's September-October 1978) (1978)
- Letter (Asimov's, June 1982) (1982)
- Letter (Astounding Stories, December 1937) (1937)
- Letter (Astounding Stories, September 1937) (1937)
- Letter (Astounding, April 1939) (1939)
- Letter (Astounding, April 1944) (1944)
- Letter (Astounding, April 1946) (1946)
- Letter (Astounding, April 1952) (1952)
- Letter (Astounding, August 1954) (1954)
-
Letter (Astounding, December 1939): "How the Monster Lost His Plumbing—"?Letter (Astounding, December 1939): "How the Monster Lost His Plumbing-"(1939)
- Letter (Astounding, December 1953) (1953)
- Letter (Astounding, February 1939) (1939)
- Letter (Astounding, February 1947) (1947)
- Letter (Astounding, February 1951) (1951)
- Letter (Astounding, February 1952) (1952)
- Letter (Astounding, January 1939) (1939)
- Letter (Astounding, January 1958) (1958)
- Letter (Astounding, July 1941) (1941)
- Letter (Astounding, March 1949) (1949)
- Letter (Astounding, March 1953) (1953)
- Letter (Astounding, May 1942) (1942)
- Letter (Astounding, May 1946) (1946)
- Letter (Astounding, October 1942) (1942)
- Letter (Astounding, October 1945) (1945)
- Letter (Astounding, October 1956) (Obituary Fletcher Pratt) (1956)
- Letter (Astounding, September 1938) (1938)
- Letter (Astounding, September 1954) (1954)
- Letter (Cromlech #2) (1987)
- Letter (Cross Plains V1n6) (1975)
- Letter (Crypt of Cthulhu, Candlemas 1988) (1988)
- Letter (Crypt of Cthulhu, Eastertide 1982) (1982)
- Letter (Crypt of Cthulhu, Eastertide 1985) (1985)
- Letter (Crypt of Cthulhu, Eastertide 1990) (1990)
- Letter (Crypt of Cthulhu, Eastertide 1991) (1991)
- Letter (Crypt of Cthulhu, Hallowmas 1986) (1986)
- Letter (Crypt of Cthulhu, Hallowmas 1987) (1987)
- Letter (Crypt of Cthulhu, Hallowmas 1989) (1989)
- Letter (Crypt of Cthulhu, Lammas 1984) (1984)
- Letter (Crypt of Cthulhu, Lammas 1987) (1987)
- Letter (Crypt of Cthulhu, Michaelmas 1984) (1984)
- Letter (Crypt of Cthulhu, Michaelmas 1985) (1985)
- Letter (Crypt of Cthulhu, Michaelmas 1986) (1986)
- Letter (Crypt of Cthulhu, Roodmas 1982) (1982)
- Letter (Crypt of Cthulhu, Roodmas 1987) (1987)
- Letter (Crypt of Cthulhu, St. John's Eve 1982) (1982)
- Letter (Crypt of Cthulhu, St. John's Eve 1983) (1983)
- Letter (Crypt of Cthulhu, St. John's Eve 1984) (1984)
- Letter (Crypt of Cthulhu, Yuletide 1981) (1981)
- Letter (Crypt of Cthulhu, Yuletide 1983) (1983)
- Letter (F&SF, January 1977) (1977)
- Letter (Fantastic Stories of Imagination, October 1961) (1961)
- Letter (Fantastic, April 1978) (1978)
- Letter (Fantastic, December 1970) (1970)
- Letter (Fantasy Crossroads, August 1976) (1976)
- Letter (Fantasy Crossroads, February 1976) (1976)
- Letter (Fantasy Crossroads, January 1979) (1979)
- Letter (Fantasy Crossroads, June 1978) (1978)
- Letter (Fantasy Crossroads, March 1977) (1977)
- Letter (Fantasy Crossroads, November 1975) (1975)
- Letter (Fantasy Crossroads, November 1977) (1977)
- Letter (Fantasy Newsletter No. 61) (1983)
- Letter (Fantasy Review, July 1984) (1984)
- Letter (Haunted V1n2) (1964)
- Letter (Locus #216) (1978)
- Letter (Locus #227) (1979)
- Letter (Locus #235) (1980)
- Letter (Locus #242) (1981)
- Letter (Locus #282) (1984)
- Letter (Magazine of Horror, July 1969) (1969)
- Letter (Magazine of Horror, September 1968) (1968)
- Letter (New Venture, Summer 1976) (1976)
- Letter (Nostradamian Interlude) (1953)
- Letter (Nyctalops #14, March 1978) (1978)
- Letter (OAK Leaves, V2n15 Spring 1982) (1982)
- Letter (Phantasy Digest #2) (1977)
- Letter (Quantum (1975-78), #2) (1976)
- Letter (REH: Two-Gun Raconteur #4) (1977)
- Letter (Science Fiction Chronicle #126) (1990)
- Letter (Science Fiction Review #16) (1976)
- Letter (Science Fiction Review, August 1969) (1969)
- Letter (Science Fiction Review, August 1970) (1970)
- Letter (Science Fiction Review, January 1971) (1971)
- Letter (Science Fiction Review, March 1971) (1971)
- Letter (Science Fiction Review, November 1970) (1970)
- Letter (Science Fiction Stories, March 1957) (1957)
- Letter (Science Fiction Stories, May 1958) (1958)
- Letter (Science-Fantasy Review, Autumn 1949) (1949)
- Letter (SF Commentary 24) (1971)
- Letter (Startling Stories, December 1952) (1952)
- Letter (Startling Stories, January 1952) (1952)
- Letter (Startling Stories, November 1950): Sometimes Silly (1950)
- Letter (The Barbarian Scroll #15) (1991)
- Letter (The Diversifier #12) (1976)
- Letter (The Diversifier #15) (1976)
- Letter (The Diversifier #17) (1976)
- Letter (Thrilling Wonder Stories, August 1952) (1952)
- Letter (Thrilling Wonder Stories, August 1953) (1953)
- Letter (Thrilling Wonder Stories, December 1951) (1951)
- Letter (Unknown Worlds, April 1942) (1942)
- Letter (Unknown Worlds, April 1942) (1942) with Lyon Sprague de Camp
- Letter (Unknown, June 1939): It sounds unpleasant to put this way (1939)
- Letter (Unknown, October 1939): "Comments on Yoga" (1939)
- Letter [2] (Crypt of Cthulhu, Michaelmas 1986) (1986)
- Letter to Damon Knight (SFWA Bulletin, June 1967) (1967)
- Letter to Joel Frieman, 21 October 1967 (1968)
- Letter to Joel Frieman, October 21, 1967 ("Dear Joel: / The first time I read a Conan (or other Howard) story...") (1986)
- Letter to Psychotic, July 1968 (1968)
- Letter to Psychotic, May 1968 (1968)
- Letter to Psychotic, September 1968 (1968)
- Letter to Rusty Burke, May 20, 1984 (excerpt) (2005)
- Letter to Science Fiction Review, December 1969 (1969)
- Letter to SFWA Bulletin, August 1967 (1967)
- Letter to The Bulletin of the Science Fiction Writers of America, January 1977 (1977)
- Letter to The Bulletin of the Science Fiction Writers of America, June 1976 (1976)
- Letter to The Bulletin of the Science Fiction Writers of America, Winter 1978 (1978)
- Letter to The SFWA Forum # 96, July-August 1986 (1986)
- Letter: African Swackles (1960)
- Letter: On "Gurre" (1973)
- Letter: On "Yuetshi" Again (1966)
- Letter: On - er - Previous Letters (1963)
- Letter: On a Scroll (1962)
- Letter: On Almuric and "Yuetshi" (1966)
- Letter: On Amras (1976)
- Letter: On an Anthology (1962)
- Letter: On Animals (1973)
- Letter: On Antique Apes (1973)
- Letter: On Buckles (1966)
- Letter: On C. A. Smith (1973)
- Letter: On Claymores (1976)
- Letter: On Dark Snouts (1969)
- Letter: On Dunsany (1962)
- Letter: On Europe (1969)
- Letter: On Jhil (1959)
- Letter: On Lovecraft Letters, Brak, Merkur, & Wet Leaves (1971)
- Letter: On Lovecraftiness (1973)
- Letter: On Lovecrafty Inspection (1974)
- Letter: On Mr. Pournelle re Sword and Quarterstaff (1964)
- Letter: On Names (1962)
- Letter: On Nomenclature (1967)
- Letter: On Pizza (1981)
- Letter: On Quaint Streetcars (1973)
- Letter: On Slopsism (1973)
- Letter: On Solomon Kane (1961)
- Letter: On Sources (1973)
- Letter: On the Gnarly Man and Old Man Mulligan (1961)
- Letter: On the Influence of Lord Dunsany on Clark Ashton Smith (1963)
- Letter: On Thendara 2 (1967)
- Letter: On Two Queries (1973)
- Letter: On Unaussprechlichen Kulten (1974)
- Letter: On Weapons of Choice &/or Necessity [2] (1963)
- Letter: Science Fiction Review, November 1968 (1968)
- Letter: The Vulture Croaks Back (1976)
- Letter: The Vulture Croaks Back (1976) with L. Sarcophagus de Camp
- Letters: On Weapons of Choice &/or Necessity (1963)
- Literary Swordsmen & Sorcerers: El-Ron of the City of Brass (1975)
- Literary Swordsmen & Sorcerers: Eldritch Yankee Gentleman - Part One (1971)
- Literary Swordsmen & Sorcerers: Eldritch Yankee Gentleman - Part Two (1971)
- Literary Swordsmen & Sorcerers: Pratt and His Parallel Worlds (1972)
- Literary Swordsmen & Sorcerers: Sierran Shaman (1972)
- Literary Swordsmen & Sorcerers: Skald in the Post Oaks (1971)
- Literary Swordsmen & Sorcerers: Superman in a Derby (1974)
- Literary Swordsmen & Sorcerers: The Architect of Camelot (1975)
- Literary Swordsmen & Sorcerers: Two Men in One (1972)
- Literary Swordsmen & Sorcerers: White Wizard in Tweeds (1976)
- Literary Swordsmen & Sorcerers: William Morris, Jack of All Arts (1974)
- Literature and Esthetics (1976)
- Little Green Men from Afar (1976)
- Long Ago and Far Away (1980)
- Lost Cities (1957)
- Lost Continents No. 1: The Story of Atlantis (1952)
- Lost Continents No. 2: The Resurgence of Atlantis (1952)
- Lost Continents No. 3: The Land of the Lemurs (1952)
- Lost Continents No. 4: The Hunting of the Cognate (1953)
- Lost Continents No. 5: The Mayan Mysteries (1953)
- Lost Continents No. 6: Welsh and Other Indians (1953)
- Lost Continents No. 7: The Creeping Continents (1953)
- Lost Continents No. 8: The Silvery Kingdom (1953)
- Lost Continents No. 9: The Author of Atlantis (1953)
- Lovecraft and the Aryans (1975)
- Lovecraft: Failed Aristocrat (1975)
- Mad Men of Science (1956)
- Mammoths and Mastodons (1965)
- Mammut e mastodonti (Part 1 of 2) [Italian] (1965)
- Mammut e mastodonti (Part 2 of 2) [Italian] (1965)
- Man's Biological Future (1980)
- Memories of R. E. H. (1966)
- Merlin on the Queens Express (1975)
- Moments of Truth (1982)
- Mon ami Isaac Asimov [French] (1967)
- More Mad Men of Science (1957)
- More Multiple Scroll (1967)
- More Scrollery (Amra V2n47, August 1968) (1968)
- More Stirrups (1981)
- Multiple Scroll (1966)
- Multiple Scrolls (Amra V2n52, April 1970) (1970)
- Multiple Scrolls (Amra V2n54, April 1971) (1971)
- Mundy's Vendhya (1970)
- Mundy's Venhya (1970)
- My Fellow Primates and I (1972)
- Myths & Mythmakers (1981)
-
Nachschrift (Ein Elefant für Aristoteles)?Nachschrift (Ein Elefant fuer Aristoteles)[German] (1989)
- NASA Heinlein Retrospective Tribute (1988)
- Noble Savage (1980)
- Nota do autor (Construtores de continentes) [Portuguese] (1977)
- Notes from the de Camps (1984) with Catherine Crook de Camp
- Of Kipling and Me (1989)
- Omini Verdi Venuti Da Lontano [Italian] (2001)
- On Books of Magic (Unknown Worlds, February 1943) (1943)
- On Books of Magic (Unknown Worlds, February 1943) (1943) with J. Wellington Wells
- On Justice Delayed (1975)
- One Day in the Cretaceous (1968) with Catherine Crook de Camp
- Orthodoxy in Science (1954)
- Pfui on Psi (1957)
- Philosophy (1976)
- Pirettes (1960)
- Pittthing Gaintelling (2020)
- Places Near & Far (1981)
- Postscript (Footprints on Sand) (1981)
- Postscript to "There Ain't no Such." (1941)
- Pratt's Parallel Worlds (1965)
- Preface (Al Azif) (1973)
- Preface (The Ancient Engineers) (1963)
- Preface (The Fringe of the Unknown) (1983)
- Preface (The Ragged Edge of Science) (1980)
- Preface to the Al-Azif (1996)
- Preface to the Necronomicon (1981)
- Presentazione [Italian] (1975)
- Presentazione (Conan il conquistatore) [Italian] (1972)
- Probability Zero! (Astounding, April 1942) (1942) with Isaac Asimov and Malcolm Jameson
- Probability Zero! (Astounding, April 1942) (1942) with George E. Dale and Malcolm Jameson
- Probability Zero! (Astounding, August 1942) (1942) with John Carnell and Joseph Gilbert and Jack Speer
- Probability Zero! (Astounding, August 1942) (1942) with Ted Carnell and Joseph Gilbert and Jack Speer
- Probability Zero! (Astounding, February 1943) (1943) with Fox B. Holden and Malcolm Jameson and Henry Kuttner
- Probability Zero! (Astounding, February 1943) (1943) with Fox B. Holden and Colin Keith and Henry Kuttner
- Professionalism (1976)
- Proofreaditorial Note on Heraldry (1970)
- Pseudohistory (1981)
- Pure Science (1959)
- Range (1965)
- Ranging Afterthoughts (1965)
- Readin' and Writhin' (Future Science Fiction, #32) (1957)
- Readin' and Writhin' (Future Science Fiction, August 1954) (1954)
- Readin' and Writhin' (Future Science Fiction, May 1952) (1952) with Robert A. W. Lowndes
- Readin' and Writhin' (Future Science Fiction, May 1952) (1952) with Robert W. Lowndes
- Readin' and Writhin' (Science Fiction Quarterly, August 1953) (1953)
- Readin' and Writhin' (Science Fiction Quarterly, August 1955) (1955) with Damon Knight and Robert A. W. Lowndes
- Readin' and Writhin' (Science Fiction Quarterly, August 1955) (1955) with Damon Knight and Robert W. Lowndes
- Readin' and Writhin' (Science Fiction Quarterly, May 1956) (1956)
- Readin' and Writhin' (Science Fiction Quarterly, November 1953) (1953)
- Readin' and Writhin' (Science Fiction Stories, September 1957) (1957)
- Remembering Lin Carter (1988) with Catherine Crook de Camp
- Response to "The New Generation Gap" (1989)
- Response to Professor Mosig (1975)
- Returned from Hell? (1939)
- Returned from Hell? (1939) with L. S. de Camp
- Review of nongenre nonfiction "The Knight" by George Shipway (1971)
- Review of nongenre nonfiction _Animals, Myths, and Men_ (Richard Lewinsohn) (1955)
- Review of nongenre nonfiction title "History of the Franks" by Gregory of Tours (1978)
- Review of nongenre nonfiction title "The Knight and the Umbrella" by Ian Anstruther (1965)
- Review of nongenre nonfiction title "The Year of the Horsetails" by R. F. Tapsell (1968)
- Review of nongenre nonfiction title "Vanished Cities" by Hermann and George Schreiber (1959)
- Review of nongenre title "The Curved Saber" by Harold Lamb (1965)
- Review of nongenre title "The Curved Saber" by Harold Lamb (1965) with L. S. de Camp
- Review of nongenre title "The Knights of Dark Renown" by Graham Shelby (1971)
- Review of nongenre title "The Mighty Manslayer" by Harold Lamb (1970)
- Review of nongenre title "Tomorrow's Fire" by Jay Williams (1971)
- Review of the nonfiction work "Nostradamus: The Man Who Saw Through Time" by Lee McCann (1942)
- Review of the nonfiction work "Nostradamus: The Man Who Saw Through Time" by Lee McCann (1942) with J. Wellington Wells
- Review of the nonfiction work "Viking Expansion Westwards" by Magnus Magnusson (1974)
- Review of the nongenre nonfiction title "The Winter Serpent" by M. H. Davis (1968)
- Review of the nongenre title "The Kings of Vain Intent" by Graham Shelby (1971)
- Reviews (Astounding, June 1949) (1949)
- Robert E. Howard [German] (1970)
- Robert E. Howard's Conan [German] (1983)
- Robert E. Howard's Fiction (1985)
- Robert Heinlein: In Memoriam (1988)
- Round About the Cauldron (1980)
- Rubber Dinosaurs and Wooden Elephants (1987)
- Savages and Scriveners (1978)
- Science (1976)
- Science and Pseudo-Science (1980)
- Science-Fiction-Stories 20 [German] (1973) with uncredited
- Scroll (1970)
- Scroll (Amra V2n54, April 1971) (1971)
- Scroll (Amra V2n71, July 1982) (1982)
- Scrolls (1963)
- Scrolls (1973) with Albert A. Nofi
- Scrolls (Amra V2n55, December 1971) (1971)
- Scrolls (Amra V2n60, September 1973) (1973) with Bert Duch and Albert A. Nofi
- Scrolls (Amra V2n60, September 1973) (1973) with Bert Duch and Al Nofi
- Scrolls (Amra V2n64, October 1975) (1975)
- Scrolls (Amra V2n67, February 1977) (1977) with Val D. Conder
- Scrolls (Amra V2n68, July 1978) (1978) with John Boardman
- Scrolls and Such (Amra V2n13, 1960) (1960)
- Scrolls and Such (Amra V2n7, November 1959) (1959)
- Seen in My Travels (1972)
- Sesquithoughts on Lovecraft (1978)
- Sherd (Amra V2n44, October 1967) (1967)
- Sherd 1 (1966)
- Sherd 2 (1966)
- Sherd: The Howard Collector (1966)
- Short Scrolls (Amra V2n56, June 1972) (1972)
- Silent Specters, Spiders, and Sauropods (1986)
- Skald in the Post Oaks (1971)
- Small Scrolls (1961) with P. Schuyler Miller
- So You Want to be a Prophet? (1966)
- Some Other Thoughts (1981)
- Sonia & H.P.L. (1973)
- Sorcerers, Symbols, and Spells (1987)
- Speaking Stones & Bricks (1981)
- Sprague's Swackles (Amra V2n58, January 1973) (1973)
- Stirrups & Scholarship (1977)
- Stirrups and Scholarship (1977)
- Sublimated Bloodthirstiness (1965) with Poul Anderson and John P. Conlon
- Superaddendum to the Exegesis (1967)
- Swackle (Amra V2n24, May 1963) (1963)
- Swackle (Amra V2n29, August 1964) (1964)
- Swackle (Amra V2n43, March 1967) (1967)
- Swackle (Amra V2n55, December 1971) (1971)
- Swackle (Amra V2n62, October 1974) (1974)
- Swords, Sorcery, and Scribblers (1972)
- Tales from Gavagan's Bar Series (1980)
- Tellers of Tales (1967)
- The Adventure of Harold Shea (1991)
- The Ape-Man Within Us (1989)
- The Assyrians: Masters of the East (1976) with Cliff Bird
- The Autobiography of L. Sprague de Camp (excerpts) (1996)
- The Barbarian as Hero (1977)
- The Barbarian Hero (1976)
- The Breeds of Man (1976)
- The Care and Feeding of Mad Scientists (1951)
- The Care and Feeding of Scientists (1983)
- The Coming of the Engineers (1963)
- The Compleat Duellist (1964)
- The Complete Duelist (1964)
- The Con Man from Bagdad (1996)
- The Conan Saga (1978)
- The Conans of Albion (1974)
- The Decline and Fall of Adam (1973)
- The Downfall of Alchemy (1957)
- The Elder Profession (1954)
- The Falls of Troy (1970)
- The First Missile Launchers (1960)
- The Glass-Eyed Dragon (1988)
- The Golden Mirage (1953)
- The Great Charlatans (1953)
- The Great Floods (1949)
- The Great Glass Jewel (1966) with Catherine Crook de Camp
- The Great Pseudomath (1980)
- The Great Satanist Plot (1963)
- The Great Whale Robbery (1983)
- The Heroic Barbarian (1975)
- The Human Condition (1981)
- The Insidious Doctor Conan (1964)
- The Insidious Dr. Conan (1964)
- The Iron Pillar of Delhi (1972)
- The Krishna Stories (1959)
- The Krishna Stories (1982)
- The Landlocked Indian Ocean (1969)
-
The Leiber– de Camp Duel?The Leiber- de Camp Duel(1993)
- The Long-Tailed Huns (Part 1 of 2) (1942)
- The Long-Tailed Huns (Part 2 of 2) (1942)
- The Lost Continents of Fiction (1954)
- The Man Who Invented R. & D. (1996)
- The Mayan Elephants (1950)
- The Mechanical Wizards of Alexandria (1962)
- The Mislaid Tribes (1952)
- The Mountain of Light (1952)
- The Mysterious Kabbalah (1956)
- The Mystic Trance (1951)
- The Mythological Background (1956)
- The Need to Know (1983)
- The People Who Make Other Worlds No. 6: L. Sprague de Camp (1952)
- The Phantom Phoenicians (1953)
- The Prose Tales of Clark Ashton Smith (1963)
- The Pyramids of Kush (1968)
- The Quarter-Acre Round Table (1970)
- The Science of Whithering (Part 1 of 2) (1940)
- The Science of Whithering (Part 2 of 2) (1940)
- The Scientist (1978) with Thomas D. Clareson
- The Sea King's Armored Division (Part 1 of 2) (1941)
- The Sea King's Armored Division (Part 2 of 2) (1941)
- The Search for Superman (1976)
- The So-Called Fourth Dimension (1951)
- The Space Suit (1948)
- The Stars in Their Courses (1954)
- The Stone of the Wise (1956)
- The Street of the Dead: Teotihuacán (1970)
- The Temperamental Tank (1983)
- The Tower of Mystery (1970)
- The Trail of Tranicos (1967)
- The Wisdom of the Ancients (1951)
- There's Just as Good Fish-- (1939)
- Thoats, Tharks,and Thews (1987)
- Three Thirds of a Hero (1972)
- Time & Space (1993)
- To Roy Thomas' Savage Sword: Letter (1981)
- Travel, Description and History (1976)
- Tula and the Vanished Toltecs (1972)
- untitled (The Faces of Science Fiction) (1984)
- Up and Away from the School of Invention (1973)
- Varied Fancies (1972)
-
Von und über?Von und ueber[German] (1982)
- Vorwort (Der Herrscher Pterodactyls) [German] (1982)
- What Is a Rosicrucian? (1956)
- Where Were We? (1952)
- Why Do They Do It? (1950)
- Why I Selected- The Hibited Man (1949)
- Willy (1969)
- Wonders Are Many (1958)
- Xerxes' Okapi (1983)
- Xerxes' Okapi and Greek Geography (1963)
- Yearish Look-Well (1967)
- Yearish Look-Well (1967) with de Camp
- Yearly Foregathering Againcarry (1967)
- Yearly Foregathering Againcarry (1967) with de Camp
- You Can't Beat Brains (1966)
- Young Man Lovecraft (1978)
-
Въведение (Конан авантюриста)?Vavedenie (Konan avantyurista)[Bulgarian] (1997) withЛ. Спрейг?L. Spreyg
-
Въведение (Конан воинът)?Vavedenie (Konan voinat)[Bulgarian] (1997) withЛ. Спраг де Камп?L. Sprag de Kamp
-
Въведение (Конан отмъстителя)?Vavedenie (Konan otmastitelya)[Bulgarian] (1998) withЛ. Спрег де Камп?L. Spreg de Kamp
-
Въведение (Конан узурпатора)?Vavedenie (Konan usurpatora)[Bulgarian] (1998) withЛ. Спрейг де Камп?L. Spreyg de Kamp
-
Предговор (Конан скитника)?Predgovor (Konan skitnika)[Bulgarian] (1998) withЛ. Спрег де Камп?L. Spreg de Kamp
-
Увод (Конан от Аквилония)?Uvod (Konan ot Akviloniya)[Bulgarian] (1997) withЛ. Спрег де Камп?L. Spreg de Kamp
- Great Cities of the Ancient World (1972)
- Scribblings (1972)
- A Map of the World of Conan in the Hyborian Age (1966) with John D. Clark, Ph.D. and Robert E. Howard and David A. Kyle and P. Schuyler Miller
- A Map of the World of Conan in the Hyborian Age (1966) with John D. Clark and Robert E. Howard and David Kyle and P. Schuyler Miller
- Design for Life (Part 2 of 2) (1939) with Willy Ley
- Tales of Conan (Map of the world of Conan) (1955) with David A. Kyle
- Tales of Conan (Map of the world of Conan) (1955) with David Kyle
- A Gent from Bear Creek (1966) by Robert E. Howard
- A Handbook of Science Fiction and Fantasy (1955) by Donald H. Tuck
- A Modern Look at Monsters (1971) by Daniel Cohen
- A Quest for Simbilis (1974) by Michael Shea
- A Scientific Report on "The Search for Bridey Murphy" (1957) by Milton V. Kline
- A Wizard of Earthsea (1970) by Ursula K. Le Guin
- Always Comes Evening (1978) by Robert E. Howard
- An Index on the Weird & Fantastica in Magazines (1954) by Bradford M. Day
- Animals Without Backbones (1940) by Ralph Buchsbaum
- At the Edge of the World (1971) by Lord Dunsany
- Atlan (1966) by Jane Gaskell
- Barbarians of Mars (1966) by Edward P. Bradbury
- Biography of the Earth (1942) by George Gamow
- Black Vulmea's Vengeance & Other Tales of Pirates (1977) by Robert E. Howard
- Blades of Mars (1966) by Edward P. Bradbury
- Brak the Barbarian Versus the Mark of the Demons (1970) by John Jakes
- Brak the Barbarian Versus the Sorcerers (1970) by John Jakes
- Bran Mak Morn (1970) by Robert E. Howard
-
Chariots of the Gods? (1976)
by
Erich von Däniken?Erich von Daeniken
- City at World's End (1951) by Edmond Hamilton
- Conan the Barbarian (1955) by Robert E. Howard
- Conan the Conqueror (1951) by Robert E. Howard
- Conquest by Man (1956) by Paul Herrman
- Cults of Unreason (1974) by Christopher Evans (I)
- Day of the Minotaur (1968) by Thomas Burnett Swann
- Dead Cities and Forgotten Tribes (1953) by Gordon Cooper
- Deryni Rising (1971) by Katherine Kurtz
- Don Rodriguez: Chronicles of Shadow Valley (1971) by Lord Dunsany
- Dragons in Amber (1951) by Willy Ley
- Eaters of the Dead (1977) by Michael Crichton
- Echoes from an Iron Harp (1972) by Robert E. Howard
- Elidor (1971) by Alan Garner
- Evolution of the Vertebrates (1957) by Edwin H. Colbert
- Excalibur (1974) by Sanders Anne Laubenthal
- Explorations in Science (1953) by Waldemar Kaempffert
- Far Lands, Other Days (1978) by E. Hoffmann Price
- Fear & The Ultimate Adventure (1971) by L. Ron Hubbard
- Flying Saucers (1953) by Donald H. Menzel
- Gate of Ivrel (1978) by C. J. Cherryh
- Gerfalcon (1966) by Leslie Barringer
- Golden Cites, Far (1971) by Lin Carter
- Grotesques and Fantastiques (1973) by Clark Ashton Smith
- Guardians of the Gate (1972) by Jacquelyn Trimble and Louis Trimble
- Gulliver of Mars (1966) by Edwin L. Arnold
-
Hadon of Ancient Opar (1975)
by
Philip José Farmer?Philip Jose Farmer
- Heroes and Villains (1974) by Angela Carter
- High Deryni (1974) by Katherine Kurtz
- Horrors Unknown (1971) by Sam Moskowitz
- How Came Civilization? (1941) by Fitzroy Richard Somerset Raglan
- Howard Phillips Lovecraft: Dreamer on the Nightside (1976) by Frank Belknap Long
- Hyperborea (1971) by Clark Ashton Smith
- In the Name of Science (1953) by Martin Gardner
- Index to the Science-Fiction Magazines (1926-1950) (1953) by Donald B. Day
- Inquiry Into Science Fiction (1956) by Basil Davenport
- Inside the Atom (1957) by Isaac Asimov
- Jirel of Joiry (1970) by C. L. Moore
- Joris of the Rock (1966) by Leslie Barringer
- Kandar (1970) by Kenneth Bulmer
- Kavin's World (1970) by David Mason
- Kelwin (1971) by Neal Barrett, Jr.
- King Arthur Today (1954) by Nathan Comfort Starr
- Kothar and the Demon Queen (1970) by Gardner F. Fox
- Kothar of the Magic Sword (1970) by Gardner F. Fox
- Kothar, Barbarian Swordsman (1970) by Gardner F. Fox
- Kyrik Fights the Demon World (1976) by Gardner Fox
- Kyrik: Warlock Warrior (1975) by Gardner F. Fox
- Legion from the Shadows (1977) by Karl Edward Wagner
- Lord Dunsany: A Biography (1973) by Mark Amory
- Lord of Blood (1971) by Dave Van Arnam
- Lost Cities and Vanished Civilizations (1963) by Robert Silverberg
- Lost Trails, Lost Cities (1953) by Col. P. H. Fawcett
- Lost Tribes & Sunken Continents: Myth and Method in the Study of American Indians (1963) by Robert Wauchope
- Lovecraft at Last (1975) by H. P. Lovecraft and Willis Conover
- Lud-in-the-Mist (1971) by Hope Mirrlees
- Man in Search of his Ancestors (1957) by André Senet
- Maps of the Ancient Sea Kings (1967) by Charles H. Hapgood
- Marchers of Valhalla (1973) by Robert E. Howard
- Masters of the Occult (1972) by Daniel Cohen
- Mention My Name in Atlantis (1974) by John Jakes
- Modern Science Fiction: Its Meaning and Its Future (1953) by Reginald Bretnor
- Mysteries beneath the Sea (1972) by William R. Corliss
- Mysterious Places (1971) by Daniel Cohen
- Myth or Legend? (1956) by G. E. Daniel and Denys Lionel Page and Reginald Francis Treharne
- Needle (1950) by Hal Clement
- Nomads of Gor (1970) by John Norman
- Northwest of Earth (1955) by C. L. Moore
- Outlaw of Gor (1968) by John Norman
- Over the Edge (1964) by August Derleth
- Pebble in the Sky (1950) by Isaac Asimov
- Planet of Exile (1967) by Ursula K. Le Guin
- Quest of the Dark Lady (1970) by Quinn Reade
- Radiocarbon Dating (1953) by Willard F. Libby
- Raiders of Gor (1972) by John Norman
- Red Blades of Black Cathay (1971) by Robert E. Howard and Tevis Clyde Smith
- Rocannon's World (1967) by Ursula K. Le Guin
- Salamanders and Other Wonders: Still More Adventures of a Romantic Naturalist (1956) by Willy Ley
- Salammbô (1961) by Gustave Flaubert
- Science is a Sacred Cow (1951) by Anthony Standen
- Scientific American Reader (1954) by Scientific American
- Selected Letters (I): 1911-1924 (1971) by H. P. Lovecraft
- Selected Letters (II): 1925-1929 (1971) by H. P. Lovecraft
- Selected Letters (III) 1929-1931 (1972) by H. P. Lovecraft
- Selected Poems (1972) by Clark Ashton Smith
- Shy Leopardess (1966) by Leslie Barringer
- Sidewise in Time (1951) by Murray Leinster
- Slaves of Sleep (1949) by L. Ron Hubbard
- Slaves of Sleep (1968) by L. Ron Hubbard
- Solomon Kane (1971) by Robert E. Howard
- Son of the White Wolf (1978) by Robert E. Howard
- Sorcerer's World (1971) by Damien Broderick
- Star Barbarian (1970) by Dave Van Arnam
- Stealer of Souls (1964) by Michael Moorcock
- Stormbringer (1966) by Michael Moorcock
- Stormbringer (1966) by Michael Moorcock (co-reviewed with L. S. de Camp)
- Sword of the Gael (1976) by Andrew J. Offutt
- Swordmen of Vistar (1970) by Charles Nuetzel
- Swords against Tomorrow (1971) by Robert Hoskins
- Swords of the Barbarians (1974) by Kenneth Bulmer
- Tales of Science and Sorcery (1966) by Clark Ashton Smith
- Taran Wanderer (1968) by Lloyd Alexander
- Tarnsman of Gor (1968) by John Norman
- The Abominations of Yondo (1960) by Clark Ashton Smith
- The Adventures of Gremlin (1968) by DuPre Jones
- The Best Science Fiction Stories: 1949 (1950) by Everett F. Bleiler and T. E. Dikty
- The Black Cauldron (1967) by Lloyd Alexander
- The Blue Star (1970) by Fletcher Pratt
- The Book of Robert E. Howard (1977) by Robert E. Howard
- The Book of Three (1967) by Lloyd Alexander
- The Books of Charles Fort (1941) by Charles Fort
- The Broken Sword (1955) by Poul Anderson
- The Broken Sword (1971) by Poul Anderson
- The Case of the Friendly Corpse (1968) by L. Ron Hubbard
- The Castle of Llyr (1967) by Lloyd Alexander
- The City (1967) by Jane Gaskell
- The Complete Prophecies of Nostradamus (1952) by Henry C. Roberts (co-reviewed with Robert A. W. Lowndes)
- The Complete Prophecies of Nostradamus (1952) by Henry C. Roberts (co-reviewed with Robert W. Lowndes)
- The Crystal Cave (1971) by Mary Stewart
- The Dark Man and Others (1964) by Robert E. Howard
- The Deep (1977) by John Crowley
- The Dinosaurs (1982) by William Service and William Stout
- The Dream-Quest of Unknown Kadath (1971) by H. P. Lovecraft
- The Exploration of Mars (1957) by Willy Ley and Wernher von Braun
- The Fellowship of the Ring (1955) by J. R. R. Tolkien
- The Foundations of Grammatology (1953) by I. J. Gelb
- The Golden Horn (1982) by Poul Anderson
- The Great Beast: The Life of Aleister Crowley (1953) by John Symonds
- The Great Captains (1956) by Henry Treece
- The Grim Land and Others (1976) by Jonathan Bacon
- The Hand of Kane (1971) by Robert E. Howard
- The High King (1968) by Lloyd Alexander
- The Immortal Storm: A History of Science Fiction Fandom (1955) by Sam Moskowitz
- The Impact of Science on Society (1953) by Bertrand Russell
- The Incredible Adventures of Dennis Dorgan (1975) by Robert E. Howard
- The Island of the Mighty (1971) by Evangeline Walton
- The Jewel in the Skull (1968) by Michael Moorcock
- The King of Elfland's Daughter (1970) by Lord Dunsany
- The Last Celt: A Bio-Bibliography of Robert Ervin Howard (1977) by Glenn Lord
- The Last Magicians (1970) by John Jakes
- The Lungfish and the Unicorn (1941) by Willy Ley
- The Lungfish, the Dodo, and the Unicorn (1949) by Willy Ley
- The Making of a Scientist (1954) by Anne Roe
- The Martian Chronicles (1951) by Ray Bradbury
- The Mighty Swordsmen (1971) by Hans Stefan Santesson
- The Mislaid Charm (1948) by Alexander M. Phillips
- The Moon of Gomrath (1966) by Alan Garner
- The Moon of Skulls (1970) by Robert E. Howard
- The Mountains of Pharaoh (1957) by Leonard Cottrell
- The Next Million Years (1953) by Charles Galton Darwin
- The Oldest Stories in the World (1953) by Theodor H. Gaster
- The Origin of Life (1938) by A. I. Oparin
- The Other Worlds (1942) by Phil Stong
- The Other Worlds (1942) by Phil Stong (co-reviewed with J. Wellington Wells)
- The Pride of Bear Creek (1967) by Robert E. Howard
- The Prism (1968) by Emil Petaja
- The Pyramids of Egypt (1954) by I. E. S. Edwards
- The Return of Kavin (1974) by David Mason
- The Road of the Sea Horse (1982) by Poul Anderson
-
The Sanger-Bredt Report: A Rocket Drive for Long Range Bombers (1953)
by
Irene Bredt
and
Eugen Sänger?Eugen Saenger
- The Science Fiction Book (1976) by Franz Rottensteiner
- The Serpent (1964) by Jane Gaskell
- The Shaving of Shagpat (1971) by George Meredith
- The Shield Ring (1967) by Rosemary Sutcliff
- The Sign of the Moonbow (1978) by Andrew J. Offutt
- The Sign of the Raven (1982) by Poul Anderson
- The Silent Past (Mysterious and Forgotten Cultures of the World) (1963) by Ivar Lissner
- The Silent Past (Mysterious and Forgotten Cultures of the World) (1964) by Ivar Lissner
- The Sorcerer's Ship (1970) by Hannes Bok
- The Sorcerer's Skull (1971) by David Mason
- The Sowers of the Thunder (1973) by Robert E. Howard
- The Spoor of Spooks and Other Nonsense (1955) by Bergen Evans
- The Story of Man (1956) by Carleton S. Coon
- The Supernatural in Fiction (1954) by Peter Penzoldt
- The Sword of Lankor (1966) by Howard L. Cory
- The Sword of Morning Star (1970) by Richard Meade
- The Sword of Shannara (1978) by Terry Brooks
- The Sword of Welleran and Other Tales of Enchantment (1955) by Lord Dunsany
- The Swords of Lankhmar (1968) by Fritz Leiber
- The Tree of Culture (1956) by Ralph Linton
- The Twelve Pictures (1955) by Edith Simon
- The Two Towers (1956) by J. R. R. Tolkien
- The Ultimate Adventure (1968) by L. Ron Hubbard
- The Uses of the Past: Profiles of Former Societies (1953) by Herbert J. Muller
- The Vultures (1974) by Robert E. Howard
- The Weirdstone of Brisingamen (1966) by Alan Garner
- The Weirwoods (1968) by Thomas Burnett Swann
- The Well of the Unicorn (1948) by George U. Fletcher
- The Well of the Unicorn (1968) by Fletcher Pratt
- The World Below (1950) by S. Fowler Wright
- The Worm Ouroboros (1955) by E. R. Eddison
- Thief of Llarn (1967) by Gardner F. Fox
- Thongor of Lemuria (1966) by Lin Carter
- Tigers of the Sea (1975) by Robert E. Howard
- Utopian Fantasy (1955) by Richard Gerber
- Waldo and Magic, Inc. (1950) by Robert A. Heinlein
- Wandor's Journey (1975) by Roland Green
- Wandor's Ride (1974) by Roland Green
- Warlocks and Warriors (1972) by Douglas Hill
- Warriors of Mars (1966) by Edward P. Bradbury
- Witch Queen of Lochlann (1970) by George Henry Smith
- Witchcraft (1943) by Charles Williams
- Witchcraft (1943) by Charles Williams (co-reviewed with J. Wellington Wells)
- Worlds in Collision (1950) by Immanuel Velikovsky
- Worms of the Earth (1974) by Robert E. Howard
- Year of the Unicorn (1966) by Andre Norton
- Zothique (1971) by Clark Ashton Smith
- An Interview with L. Sprague de Camp (1975) by Darrell Schweitzer
- An Interview with L. Sprague de Camp (follow-up) (1975) by Richard E. Geis
- Interview (The Gothic Imagination) (2011) by John C. Tibbetts (co-interviewed with Catherine Crook de Camp)
- Interview: L. Sprague de Camp (1976) by uncredited
- L. Sprague de Camp (1979) by Tom Geddie
- L. Sprague de Camp [French] (1996) by Bruno Peeters
- L. Sprague de Camp: Interview (1975) by Darrell Schweitzer
- Orbit Interview: L. Sprague de Camp [Dutch] (1981) by Darrell Schweitzer
- The Golden Aged (1988) by uncredited (co-interviewed with Jack Williamson and Catherine Crook de Camp)
Non-Genre Titles
Novels
- Bessas der Krieger [German] (1988)
- Die Reisen des Eudoxos [German] (1988)
- The Arrows of Hercules (1965)
- The Bronze God of Rhodes (1960)
- The Dragon of the Ishtar Gate (1961)
- The Golden Wind (1969)
- Ancient Ruins and Archaeology (1962) with Catherine Crook de Camp
- Ancient Ruins and Archaeology (1962) with Catherine C. de Camp
- Citadels of Mystery (1972) with Catherine C. de Camp
- Darwin and His Great Discovery (1972) with Catherine Crook de Camp
- Elephant (1964)
- Energy and Power (1962)
- Engines (1959)
- Great Cities of the Ancient World (1972)
- The Ancient Engineers (1963)