R rated sci-fi books

5467 books

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

The Bard of Castaguard
The Bard of Castaguard
Jane Welch
R
The Witness
The Witness
W. E. B. Griffin
R
Sense of Evil
Sense of Evil
Kay Hooper
R
The Plato Papers
The Plato Papers
Peter Ackroyd
R
The Lady in the Loch
The Lady in the Loch
Elizabeth Ann Scarborough
R
The Genesis Wave: Book Three
The Genesis Wave: Book Three
John Vornholt
R
Tom Swift and the Galaxy Ghosts
Tom Swift and the Galaxy Ghosts
Victor Appleton, II
R
Orlanda
Orlanda
Jacqueline Harpman
R
The Candle House
The Candle House
Pauline Fisk
R
Eclipse of the Kai
Eclipse of the Kai
Joe Dever; John Grant
R
Candle
Candle
John Barnes
R
House of Leaves
House of Leaves
Mark Z. Danielewski
R
Ghost of the Well of Souls
Ghost of the Well of Souls
Jack L. Chalker
R
Orion Arm
Orion Arm
Julian May
R
Rebel's Quest
Rebel's Quest
Gun Brooke
R
Realware
Realware
Rudy Rucker
R
The Proof House
The Proof House
K. J. Parker
R
Lieutenant Colonel
Lieutenant Colonel
Rick Shelley
R
Cold As Ice
Cold As Ice
Charles Sheffield
R
The Gate of Fire
The Gate of Fire
Thomas Harlan
R
Chimera
Chimera
Will Shetterly
R
Search for Senna
Search for Senna
K. A. Applegate
R
Guilty
Guilty
Anna Kavan
R
Eternity's End
Eternity's End
Jeffrey A. Carver
R
The Undercover Aliens
The Undercover Aliens
A. E. van Vogt
R
Robbers and Robots
Robbers and Robots
Mike Carr
R
Ceres Storm
Ceres Storm
David Herter
R
The Humboldt Effect
The Humboldt Effect
Delia Huddy
R
Ship of Fools
Ship of Fools
Richard Paul Russo
R
Guardian
Guardian
John Saul
R