R rated sci-fi books

5467 books

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

I Am No One
I Am No One
JC Andrijeski
R
The Radiant Seas
The Radiant Seas
Catherine Asaro
R
Defiance of the Fall 15
Defiance of the Fall 15
Jf Brink;Thefirstdefier
R
To Challenge Heaven
To Challenge Heaven
David Weber;Chris Kennedy
R
The Grand Inquisitor
The Grand Inquisitor
Donald Douglas
R
Ghosts of War
Ghosts of War
Bennett R. Coles
R
Watchers
Watchers
Dean Koontz
R
The Path of Duty
The Path of Duty
Eric Thomson
R
Homo Machina
Homo Machina
P. A. Vasey
R
Singularity
Singularity
Jeremy Robinson
R
Welcome to Orphancorp
Welcome to Orphancorp
Marlee Jane Ward
R
Portal
Portal
Jeffrey Wilson;Brian Andrews
R
Chains of Command
Chains of Command
Marko Kloos
R
The Bladesman of Darcliff
The Bladesman of Darcliff
Jason A. Holt
R
The Last Wall
The Last Wall
David Annandale
R
The Wheels of Chance
The Wheels of Chance
H. G. Wells
R
Interface
Interface
Chris White (I)
R
Final Battle
Final Battle
Bryan Smith (I)
R
Us Before Them (a Zach Croft Novel)
Us Before Them (a Zach Croft Novel)
J. B. Ryder
R
The Drake Equation
The Drake Equation
Bart King
R
Rebel
Rebel
Mike Shepherd
R
Outriders
Outriders
Jay Posey
R
A Rebel's Stone
A Rebel's Stone
PT McHugh
R
Sockpuppet
Sockpuppet
Matthew Blakstad
R
Rebellion
Rebellion
Alex Keller
R
C. R. O. W.
C. R. O. W.
Phillip Richards
R
Lancejack
Lancejack
Phillip Richards
R
Sherlock Holmes' Last Case
Sherlock Holmes' Last Case
George W. Harper
R
Mansfield Park and Mummies
Mansfield Park and Mummies
Vera Nazarian
R
An Adventure Among the Rosicrucians
An Adventure Among the Rosicrucians
Franz Hartmann
R