R rated sci-fi books

5467 books

Sci-fi books with mature content including explicit sex, graphic violence, or strong language. For adult readers.

Galactic Sibyl Sue Blue
Galactic Sibyl Sue Blue
Rosel George Brown
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The Will of an Eccentric
The Will of an Eccentric
Jules Verne
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Soma
Soma
Charles Platt
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To Save the Sun
To Save the Sun
Ben Bova; A. J. Austin
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Race Across the Stars
Race Across the Stars
John Cleve
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The Cycle of Deities
The Cycle of Deities
Kelsey Wolfe
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The Winter of the World
The Winter of the World
Poul Anderson
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Return to the Galaxy: A Space Opera of Alien Invasion and Human Resistance
Return to the Galaxy: A Space Opera of Alien Invasion and Human Resistance
BA Gillies
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Tom Swift and His Air Glider
Tom Swift and His Air Glider
Victor Appleton
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Hounds of Orion
Hounds of Orion
D. M. Rook;Wyatt Blair
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The Devil's Game
The Devil's Game
Poul Anderson
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Tom Swift in the Race to the Moon
Tom Swift in the Race to the Moon
Victor Appleton, II
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Soulbound
Soulbound
Kristen Callihan
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Tempus
Tempus
Janet Morris
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Sovereign
Sovereign
R. M. Meluch
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The Martian Missile
The Martian Missile
David Grinnell
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The Golden Goddess Gambit
The Golden Goddess Gambit
Larry Maddock
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The Alien Ones
The Alien Ones
Leo Brett
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Wind Child
Wind Child
R. M. Meluch
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Zanthar at Trip's End
Zanthar at Trip's End
Robert Moore Williams
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The Phantom Ones
The Phantom Ones
Pel Torro
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The Third Mutant
The Third Mutant
Lee Elliot
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Spider Play
Spider Play
Lee Killough
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Eye of Terror
Eye of Terror
Barrington J. Bayley
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The Ambassador
The Ambassador
Graham McNeill
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The Trophy
The Trophy
Bill Baldwin
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Escape from Roksamur
Escape from Roksamur
Mark Shepherd
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Spiritride
Spiritride
Mark Shepherd
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Finishing Touches
Finishing Touches
Thomas Tessier
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The High Priestess
The High Priestess
Peter Krausche
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