R rated sci-fi books

5467 books

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

Rising Sun
Rising Sun
Tavian Brack
R
War to the Knife
War to the Knife
Peter Grant
R
Kingdom of Darkness
Kingdom of Darkness
Andy McDermott
R
Virtues of War
Virtues of War
Bennett R. Coles
R
Empire of Silence
Empire of Silence
Christopher Ruocchio
R
The One
The One
John Marrs
R
Mel Foster and the Demon Butler
Mel Foster and the Demon Butler
Julia Golding
R
Curse of the Phoenix
Curse of the Phoenix
Dan Willis
R
Anywhere Else But Here
Anywhere Else But Here
Bruce Clements
R
The Primal Hunter 13
The Primal Hunter 13
Zogarth
R
Battle Angel Alita Deluxe Complete Series Box Set
Battle Angel Alita Deluxe Complete Series Box Set
Yukito Kishiro
R
The Fall of Hyperion
The Fall of Hyperion
Dan Simmons
R
Cibola Burn
Cibola Burn
James S. A. Corey
R
Mission: Tank War
Mission: Tank War
Michael Kurland
R
Babylon's Ashes
Babylon's Ashes
James S. A. Corey
R
The Unkindness of Ravens: An Alternative Romance of the Late War
The Unkindness of Ravens: An Alternative Romance of the Late War
Earl Lee
R
Demon in White
Demon in White
Christopher Ruocchio
R
The Covenant Rising
The Covenant Rising
Stan Nicholls
R
Kingdoms of Death
Kingdoms of Death
Christopher Ruocchio
R
Ashes of Man
Ashes of Man
Christopher Ruocchio
R
Shadows Upon Time
Shadows Upon Time
Christopher Ruocchio
R
Slow Gods
Slow Gods
Claire North
R
The Inheritance
The Inheritance
Ilona Andrews
R
Disquiet Gods
Disquiet Gods
Christopher Ruocchio
R
The Last Complete Series: Books 1-9
The Last Complete Series: Books 1-9
Michael John Grist
R
Goddess for Hire
Goddess for Hire
Sonia Singh
R
Greek Warriors
Greek Warriors
Marnie Riches
R
This Gulf of Time and Stars
This Gulf of Time and Stars
Julie E. Czerneda
R
The Forever War
The Forever War
Joe Haldeman
R
The Peace Child
The Peace Child
D. J. Molles
R