R rated sci-fi books

5467 books

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

Fight or Fright
Fight or Fright
Richard Hamilton
R
The Final Battle
The Final Battle
Stuart Daly
R
Pegasus
Pegasus
Amanda Bridgeman
R
I Who Have Never Known Men
I Who Have Never Known Men
Jacqueline Harpman
R
Deep Time
Deep Time
William H. Keith, Jr.
R
Lots of Bots
Lots of Bots
C. J. Richards
R
Marshals
Marshals
Brandon Rospond
R
Valuable Humans in Transit
Valuable Humans in Transit
qntm
R
The Middle of Nowhere
The Middle of Nowhere
David Gerrold
R
The Wealth of Mr. Waddy
The Wealth of Mr. Waddy
H. G. Wells
R
The Lost Command
The Lost Command
Vaughn Heppner
R
Fortune's Wheel
Fortune's Wheel
Lisanne Norman
R
The Shadow of Her Smile
The Shadow of Her Smile
Jack Beddows
R
World-Ripper War
World-Ripper War
J. S. Morin
R
Rich Man's War
Rich Man's War
Elliott Kay
R
Memory's Legion: The Complete Expanse Story Collection (The Expanse)
Memory's Legion: The Complete Expanse Story Collection (The Expanse)
James S. A. Corey
R
The War Against the Assholes
The War Against the Assholes
Sam Munson
R
The Liminal War
The Liminal War
Ayize Jama-Everett
R
Talion: Revenant
Talion: Revenant
Michael A. Stackpole
R
Time Dancers
Time Dancers
Steve Cash
R
Balanced on the Blade's Edge
Balanced on the Blade's Edge
Lindsay Buroker
R
The Key Keeper
The Key Keeper
Zara Menhennet
R
Elric: The Fortress of the Pearl
Elric: The Fortress of the Pearl
Michael Moorcock
R
Possessed by the Fallen
Possessed by the Fallen
Sharon Ashwood
R
The Acolyte
The Acolyte
Craig Davidson
R
Space Hunter War: The Complete Series: A Military Sci-Fi Series Bundle
Space Hunter War: The Complete Series: A Military Sci-Fi Series Bundle
Rick Partlow
R
The Immortalists
The Immortalists
Andrew Hook
R
The Seeds of Man
The Seeds of Man
William C. Dietz
R
Freedom vs. Aliens
Freedom vs. Aliens
T. Jackson King
R
Everyone on the Moon is Essential Personnel
Everyone on the Moon is Essential Personnel
Julian K. Jarboe
R