R rated sci-fi books

5467 books

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

Strike Zone
Strike Zone
Peter David
R
The Final Encyclopedia
The Final Encyclopedia
Gordon R. Dickson
R
Soldier, Ask Not
Soldier, Ask Not
Gordon R. Dickson
R
The Alien Way
The Alien Way
Gordon R. Dickson
R
Hour of the Horde
Hour of the Horde
Gordon R. Dickson
R
Alien Art
Alien Art
Gordon R. Dickson
R
Lifeboat
Lifeboat
Gordon R. Dickson; Harry Harrison
R
Pro
Pro
Gordon R. Dickson
R
The Far Call
The Far Call
Gordon R. Dickson
R
Lady Dasani's Debt: The Shadow Gate Trilogy: Book I
Lady Dasani's Debt: The Shadow Gate Trilogy: Book I
C. Justin Romano
R
The Devil's Heart
The Devil's Heart
Carmen Carter
R
The Stigma
The Stigma
J. Floyd King
R
My Enemy, My Ally
My Enemy, My Ally
Diane Duane
R
White Light
White Light
William Barton; Michael Capobianco
R
Blood Wolf
Blood Wolf
John Peel
R
Shadowplay
Shadowplay
Nigel Findley
R
Thrum
Thrum
Meg Smitherman
R
The Deep Pacific
The Deep Pacific
Brian C. Thompson
R
Haphazard House
Haphazard House
Mary Wesley
R
Darkwood
Darkwood
David Brianza
R
Lethal Heritage
Lethal Heritage
Michael A. Stackpole
R
The Bones of God
The Bones of God
Stephen Leigh
R
The Lost and the Lurking
The Lost and the Lurking
Manly Wade Wellman
R
Violations
Violations
Susan Wright
R
Desolation Angels
Desolation Angels
J. B. Stephens
R
A Nepenthean Solution
A Nepenthean Solution
Rod Rogers
R
Hallucinating
Hallucinating
Stephen Palmer
R
The Gods of Hell
The Gods of Hell
Randall Boyll
R
The Hangman
The Hangman
Randall Boyll
R
Onatia
Onatia
Jason Thomas
R