R rated sci-fi books

5195 books

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

The Battle Begins
The Battle Begins
Devon Hughes
R
Merlin
Merlin
Robin Stone
R
The Seed
The Seed
Davide de Angelis
R
Line War
Line War
Neal Asher
R
The Illustrated Dune
The Illustrated Dune
Frank Herbert
R
The Lost Colony
The Lost Colony
Vaughn Heppner
R
Adam's Common
Adam's Common
David Wiseman
R
Crescent City Kills
Crescent City Kills
O'Neil De Noux
R
Operation Shield
Operation Shield
Joel Shepherd
R
Chains of Command
Chains of Command
Marko Kloos
R
Green with Envy
Green with Envy
Jessica Burkhart
R
Orion's Dagger
Orion's Dagger
Paula Downing King
R
Deadhouse Gates
Deadhouse Gates
Steven Erikson
R
The Round Table
The Round Table
Jack Whyte
R
Maui: The Demigod
Maui: The Demigod
Steven Goldsberry
R
Rapture in Death
Rapture in Death
Nora Roberts
R
Helsreach
Helsreach
Aaron Dembski-Bowden
R
Like Stars in Heaven
Like Stars in Heaven
Eric Thomson
R
Intervention
Intervention
Julian May
R
Ravenor Rogue
Ravenor Rogue
Dan Abnett
R
The Guns of Two-Space
The Guns of Two-Space
Dave Grossman; Bob Hudson
R
No Other Story
No Other Story
Dr. Cuthbert Soup
R
No Mercy
No Mercy
Sherrilyn Kenyon
R
Hyperion
Hyperion
Dan Simmons
R
Trust Territory
Trust Territory
Janet Morris; Chris Morris
R
Siege & Survival
Siege & Survival
T. W. Brown
R
People of the Morning Star
People of the Morning Star
Kathleen O'Neal Gear; W. Michael Gear
R
Black Wind
Black Wind
F. Paul Wilson
R
One-Man Army
One-Man Army
John Cutter
R
City of Phants
City of Phants
Isaac Hooke
R