Contents (view Concise Listing)

• 4 • Editorial (Worlds of Tomorrow, April 1963) • [Editorial (Worlds of Tomorrow)] • essay by Frederik Pohl [as by The Editor]
• 6 • People of the Sea (Part 1 of 2) • serial by Arthur C. Clarke (book publication as Dolphin Island)
• 6 •  People of the Sea (Part 1 of 2) • interior artwork by Wallace Wood [as by Wood]
• 17 •  People of the Sea (Part 1 of 2) [2] • interior artwork by Wallace Wood [as by Wood]
• 41 •  People of the Sea (Part 1 of 2) [3] • interior artwork by Wallace Wood [as by Wood]
• 57 • X Marks the Pedwalk • short story by Fritz Leiber
• 61 • The Long Remembered Thunder • novelette by Keith Laumer
• 63 •  The Long Remembered Thunder • interior artwork by Virgil Finlay
• 83 •  The Long Remembered Thunder [2] • interior artwork by Virgil Finlay
• 91 • Where the Phph Pebbles Go • short story by Miriam Allen deFord
• 101 • Third Planet • novelette by Murray Leinster
• 102 •  Third Planet • interior artwork by uncredited
• 115 •  Third Planet [2] • interior artwork by uncredited
• 124 • Heavenly Gifts • short story by Aaron L. Kolom
• 130 • The Girl in His Mind • novelette by Robert F. Young
• 131 •  The Girl in His Mind • interior artwork by Jack Gaughan (variant of The Girl in his Mind) [as by Gaughan]
• 144 •  The Girl in His Mind [2] • interior artwork by Jack Gaughan (variant of The Girl in his Mind [2]) [as by Gaughan]
• 153 • To See the Invisible Man • short story by Robert Silverberg