R rated sci-fi books

5467 books

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

The Last Whales
The Last Whales
Lloyd Abbey
R
Ashar of Qarius
Ashar of Qarius
Clare Cooper
R
The Physiognomy
The Physiognomy
Jeffrey Ford
R
The Lake
The Lake
John Peyton Cooke
R
Wulfheim
Wulfheim
Sax Rohmer
R
Sign for the Sacred
Sign for the Sacred
Storm Constantine
R
Groupmind
Groupmind
Mike Conner
R
Playing God
Playing God
Sarah Zettel
R
Out of Sight, Out of Mind
Out of Sight, Out of Mind
Chester Aaron
R
Genesis
Genesis
Poul Anderson
R
Spirit Fox
Spirit Fox
Mickey Zucker Reichert; Jennifer Wingert
R
Speaking Stones
Speaking Stones
Stephen Leigh
R
The Last Legion
The Last Legion
Chris Bunch
R
The Reckoning
The Reckoning
Thomas F. Monteleone
R
Red Shadows
Red Shadows
Yvonne Navarro
R
The House on Hound Hill
The House on Hound Hill
Maggie Prince
R
The Mandalorian Armor
The Mandalorian Armor
K. W. Jeter
R
The Trench
The Trench
Max Marlow
R
The Vintner's Luck
The Vintner's Luck
Elizabeth Knox
R
To Waters' End
To Waters' End
Brian Daley
R
The Divided
The Divided
Katie Waitman
R
Black on Black
Black on Black
K. D. Wentworth
R
Captain
Captain
Rick Shelley
R
A Ship Possessed
A Ship Possessed
Alton Gansky
R
Nephilim
Nephilim
L. A. Marzulli
R
Brass
Brass
Robert J. Conley
R
Necroscope: Invaders
Necroscope: Invaders
Brian Lumley
R
The Extremes
The Extremes
Christopher Priest
R
Millennium Eve
Millennium Eve
Kenny Love
R
Ascending
Ascending
James Alan Gardner
R