R rated sci-fi books

5467 books

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

Cast of Fate
Cast of Fate
Allen Varney
R
Shapes
Shapes
Steve Vance
R
Probe
Probe
Carole Nelson Douglas
R
Twice Upon a Time
Twice Upon a Time
Dennis Van Wey
R
Castle of Ghosts
Castle of Ghosts
Carol Barton
R
Stella Maris
Stella Maris
Cormac McCarthy
R
Accursed
Accursed
Guy N. Smith
R
The Crystals of Mida
The Crystals of Mida
Sharon Green
R
The Quaking Lands
The Quaking Lands
Robert E. Vardeman
R
1998
1998
Richard Turner (I); William Osborne
R
Seven of Swords
Seven of Swords
Carole Nelson Douglas
R
Six of Swords
Six of Swords
Carole Nelson Douglas
R
Creatures of Forever
Creatures of Forever
Christopher Pike
R
Obsessions
Obsessions
Carol Davis
R
Monster
Monster
Christopher Pike
R
Intruder
Intruder
Robert Thurston
R
Deadly Nature
Deadly Nature
V. M. Thompson
R
Firstborn
Firstborn
Paul B. Thompson; Tonya R. Carter
R
The Scorpio Ghosts and the Black Hole Gang
The Scorpio Ghosts and the Black Hole Gang
Kathy Kennedy Tapp
R
Alpha
Alpha
Jez Cajiao
R
Greyfax Grimwald
Greyfax Grimwald
Niel Hancock
R
Web of Futures
Web of Futures
Jefferson P. Swycaffer
R
Worldstone
Worldstone
Victoria Strauss
R
Shadow
Shadow
Joyce Sweeney
R
The Silver Branch
The Silver Branch
Rosemary Sutcliff
R
Lasertown Blues
Lasertown Blues
Charles Ingrid
R
Firefight
Firefight
Larry Steelbaugh
R
Special Deliverance
Special Deliverance
Clifford D. Simak
R
Radius of Doubt
Radius of Doubt
Charles Ingrid
R
Blood Heritage
Blood Heritage
Sheri S. Tepper
R