R rated sci-fi books

5467 books

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

Fleet of Ghosts
Fleet of Ghosts
Taylor Anderson
R
Ghost Fleet: A Novel of the Next World War
Ghost Fleet: A Novel of the Next World War
P. W. Singer; August Cole
R
The Honoured
The Honoured
Rob Sanders
R
The Word for World is Forest
The Word for World is Forest
Ursula K. Le Guin
R
Into the Deep
Into the Deep
Ken Grimwood
R
The Cat's Meow
The Cat's Meow
Emily Carmichael
R
Dungeon Cataclysm
Dungeon Cataclysm
Playwars Aka Alex S Weber
R
Dungeon Freedom
Dungeon Freedom
Playwars Aka Alex S Weber
R
Dungeon Invasion
Dungeon Invasion
Playwars Aka Alex S Weber
R
Invasion
Invasion
Scott Washburn
R
Soul's Blood
Soul's Blood
Stephen Graham King
R
A. L. I. V. E.
A. L. I. V. E.
R. D. Brady
R
Old Man's War Boxed Set I
Old Man's War Boxed Set I
John Scalzi
R
.hack//AI Buster
.hack//AI Buster
Tatsuya Hamazaki
R
The Road to Hell
The Road to Hell
Joelle Presby; David Weber
R
The Handmaid's Tale and The Testaments Box Set
The Handmaid's Tale and The Testaments Box Set
Margaret Atwood
R
Murgul: Brigands of Ruk
Murgul: Brigands of Ruk
Jewel Shipley
R
The Space Between Worlds
The Space Between Worlds
Micaiah Johnson
R
The Alien Prophecy
The Alien Prophecy
Vaughn Heppner; Logan White
R
The Primal Hunter 2
The Primal Hunter 2
Zogarth
R
Blue Powder War
Blue Powder War
Walter Knight
R
The Primal Hunter 10
The Primal Hunter 10
Zogarth
R
First Contact
First Contact
T. Jackson King
R
Welcome to the Blast
Welcome to the Blast
Plum Parrot
R
Electric Angel
Electric Angel
Plum Parrot
R
Scion
Scion
James Islington
R
Fate's Reckoning
Fate's Reckoning
Plum Parrot
R
Where the Axe Is Buried
Where the Axe Is Buried
Ray Nayler
R
Tiamat's Wrath
Tiamat's Wrath
James S. A. Corey
R
Barbarian's Heart
Barbarian's Heart
Ruby Dixon
R