R rated sci-fi books

5467 books

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

Champions of the Sidhe
Champions of the Sidhe
Kenneth C. Flint
R
253
253
Geoff Ryman
R
Brainchild
Brainchild
John Saul
R
Article 23
Article 23
William R. Forstchen
R
The Time Trip
The Time Trip
Rob Swigart
R
Black Lightning
Black Lightning
John Saul
R
The Rats
The Rats
James Herbert
R
Dark Descent
Dark Descent
Marlene Perez
R
Bill, the Galactic Hero on the Planet of Robot Slaves
Bill, the Galactic Hero on the Planet of Robot Slaves
Harry Harrison
R
The Intergalactic Omniglot
The Intergalactic Omniglot
Jenni Fleetwood
R
The Phantom Piper
The Phantom Piper
Garry Kilworth
R
Wolves of the Dawn
Wolves of the Dawn
William Sarabande
R
Worm
Worm
Simon Ian Childer
R
The Night Before Dark
The Night Before Dark
Clodagh Chapman
R
In the Electric Mist with Confederate Dead
In the Electric Mist with Confederate Dead
James Lee Burke
R
Maverick
Maverick
Bruce Bethke
R
Challenge of the Seventh Carrier
Challenge of the Seventh Carrier
Peter Albano
R
Meridian 144
Meridian 144
Meg Files
R
A Taste of Blood Wine
A Taste of Blood Wine
Freda Warrington
R
Building Blocks
Building Blocks
Cynthia Voigt
R
Unification
Unification
Jeri Taylor
R
Manroot
Manroot
A. N. Steinberg
R
DarkIsle: The Final Battle
DarkIsle: The Final Battle
D. A. Nelson
R
Almost Human
Almost Human
James V. Smith, Jr.
R
Agent of Destruction
Agent of Destruction
Rutledge Etheridge
R
Forever Peace
Forever Peace
Joe Haldeman
R
The Buchanan Campaign
The Buchanan Campaign
Rick Shelley
R
The Gargoyle
The Gargoyle
Hugh Scott
R
Python Isle
Python Isle
Will Murray; Lester Dent
R
Joe Mauser: Mercenary from Tomorrow
Joe Mauser: Mercenary from Tomorrow
Michael Banks; Mack Reynolds
R