R rated sci-fi books

5467 books

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

Blackman's Burden
Blackman's Burden
Mack Reynolds
R
Bedlam Boyz
Bedlam Boyz
Ellen Guon
R
Fleet Action
Fleet Action
William R. Forstchen
R
Look to Windward
Look to Windward
Iain M. Banks
R
Eight Hundred Leagues on the Amazon
Eight Hundred Leagues on the Amazon
Jules Verne
R
Captives in Space
Captives in Space
Joseph Greene
R
From Outer Space
From Outer Space
Hal Clement
R
Pandora
Pandora
Alan Rodgers
R
Voices of Hope
Voices of Hope
David Feintuch
R
Antares Dawn
Antares Dawn
Michael McCollum
R
Saber & Shadow
Saber & Shadow
S. M. Stirling; Shirley Meier
R
Shaman's Moon
Shaman's Moon
Sarah Dreher
R
Dragon Defense Force - Dark Space
Dragon Defense Force - Dark Space
Jeffrey Caddell
R
Battle Hymn
Battle Hymn
William R. Forstchen
R
Alien from Arcturus
Alien from Arcturus
Gordon R. Dickson
R
Union Forever
Union Forever
William R. Forstchen
R
A Band of Brothers
A Band of Brothers
William R. Forstchen
R
Mortal Kombat
Mortal Kombat
James D. Macdonald
R
The Cylon Death Machine
The Cylon Death Machine
Glen A. Larson; Robert Thurston
R
Battlehymn
Battlehymn
Brian Daley; James Luceno
R
Forest of the Night
Forest of the Night
Marti Steussy
R
Dagger Magic
Dagger Magic
Katherine Kurtz; Deborah Turner Harris
R
Path of the Berserker 5
Path of the Berserker 5
Rick Scott
R
The Big Book of Science Fiction
The Big Book of Science Fiction
Jeff VanderMeer
R
Fireheart
Fireheart
Kim Wilkins
R
Aurora Rising (The Prefect Dreyfus Emergencies, 1)
Aurora Rising (The Prefect Dreyfus Emergencies, 1)
Alastair Reynolds
R
Starhiker
Starhiker
Jack Dann
R
Signal to Noise
Signal to Noise
Carla Sinclair
R
The Butcher of Anderson Station
The Butcher of Anderson Station
James S. A. Corey
R
The War of Winter: A Frozen Apocalypse LitRPG
The War of Winter: A Frozen Apocalypse LitRPG
Shane Purdy
R