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 Fish in Room 11
The Fish in Room 11
Heather Dyer
R
The Last Battle
The Last Battle
Chris Bunch
R
Fudge Factor
Fudge Factor
Robert Elmer
R
Mobius
Mobius
Dave Snow
R
Second Eden
Second Eden
Carlton W. Austin
R
Willow and the Ice Fairies
Willow and the Ice Fairies
C. F. Lander
R
Out of the Blue: Book One of Project Infinity
Out of the Blue: Book One of Project Infinity
Tom Inabnet
R
Into the Storm
Into the Storm
Meghan Brunner
R
Merlin
Merlin
Robin Stone
R
The Obelisk
The Obelisk
Michael W. Henretty
R
Asses in Clover
Asses in Clover
Eimar O'Duffy
R
Reclusive Authority
Reclusive Authority
Bruce Kost
R
Dark Mirror
Dark Mirror
Craig Shaw Gardner
R
The Rosetta Codex
The Rosetta Codex
Richard Paul Russo
R
Eon Dream: The Seven Sojourns Of Au Syen On
Eon Dream: The Seven Sojourns Of Au Syen On
Robert Payne
R
Like Stars in Heaven
Like Stars in Heaven
Eric Thomson
R
In Silent Graves
In Silent Graves
Gary A. Braunbeck
R
The Trip
The Trip
Robin Matchett
R
Hunting Moon
Hunting Moon
Rebecca York
R
Laveidem
Laveidem
Jennifer McFann
R
War of the Realms
War of the Realms
Kate O'Hearn
R
The Apparition Trail
The Apparition Trail
Lisa Smedman
R
The Etched City
The Etched City
K. J. Bishop
R
The Memory Singer
The Memory Singer
T. Jackson King
R
Hell's Foundations Quiver
Hell's Foundations Quiver
David Weber
R
Forged in Battle
Forged in Battle
Justin Hunter (UK)
R
Kunma
Kunma
Frank Corsaro
R
War Factory
War Factory
Neal Asher
R
Explosive Negotiations
Explosive Negotiations
Michael Anderle
R
The Ancient Legacy
The Ancient Legacy
Mitchell Graham
R