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 Golden World
The Golden World
Zach Hughes
R
The City in the Mist
The City in the Mist
Zach Hughes
R
The Veiled Picture; or, The Mysteries of Gorgono
The Veiled Picture; or, The Mysteries of Gorgono
Ann Radcliffe
R
Junkyard Planet
Junkyard Planet
H. Beam Piper
R
The Accidental Afterlife of Thomas Marsden
The Accidental Afterlife of Thomas Marsden
Emma Trevayne
R
A Reasonable World
A Reasonable World
Damon Knight
R
Ties of Power
Ties of Power
Julie E. Czerneda
R
Icebound
Icebound
Dean Koontz
R
Storm Warriors
Storm Warriors
Brian Stableford
R
Califia's Daughters
Califia's Daughters
Laurie R. King
R
The Crystal Portal: Nero's Touch
The Crystal Portal: Nero's Touch
Joyce Holland
R
A Silence in Heaven
A Silence in Heaven
Chris Kennedy
R
A History Maker
A History Maker
Alasdair Gray
R
System: With His face in the Sun
System: With His face in the Sun
Jon A. Davidson
R
Alien Assist
Alien Assist
Robert F. Rosenzweig
R
The Apple Stone
The Apple Stone
Nicholas Stuart Gray
R
Battle for the Blood
Battle for the Blood
Lucienne Diver
R
Changeling
Changeling
Stephen Leigh
R
Escape from Aliens
Escape from Aliens
T. Jackson King
R
The Devil's Tool
The Devil's Tool
George Bradley
R
The Road to Damascus
The Road to Damascus
John Ringo; Linda Evans
R
Forbidden Light
Forbidden Light
Tom Rybolt
R
The Fortunate Fall
The Fortunate Fall
Raphael Carter
R
The Rudest Alien on Earth
The Rudest Alien on Earth
Jane Leslie Conly
R
Roth
Roth
Anna Hackett
R
The Bomb That Failed
The Bomb That Failed
Ronald Clark
R
The Salt War
The Salt War
Joe Nobody
R
The Griefer's Revenge
The Griefer's Revenge
Winter Morgan
R
Wolf and Iron
Wolf and Iron
Gordon R. Dickson
R
Aldabra or the Tortoise Who Loved Shakespeare
Aldabra or the Tortoise Who Loved Shakespeare
Silvana Gandolfi
R