Titles by August Derleth marked with tag: Cthulhu Mythos
- 1997 - The Cthulhu Mythos
- 1971 - Innsmouth Clay with H. P. Lovecraft
- 1971 - Tales of the Cthulhu Mythos: Volume 1
- 1971 - Tales of the Cthulhu Mythos: Volume 2
- 1969 - Tales of the Cthulhu Mythos
- 1969 - The Cthulhu Mythos
- 1962 - A Note on the Cthulhu Mythos
- 1962 - The Trail of Cthulhu
- 1958 - The Mask of Cthulhu
- 1952 - The Black Island
- 1951 - The Keeper of the Key
- 1949 - The Testament of Claiborne Boyd
- 1945 - The Watcher from the Sky
- 1944 - The Trail of Cthulhu
- 1941 - Beyond the Threshold
- 1933 - The Thing That Walked on the Wind