R rated sci-fi books

5195 books

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

22nd Century Blues
22nd Century Blues
Steve Walker
R
Outbound Flight
Outbound Flight
Timothy Zahn
R
An Unprivate War
An Unprivate War
T. S. Snow
R
The Hackers of Oz
The Hackers of Oz
Tom Mula
R
The Fourth Round Indo-Pak War
The Fourth Round Indo-Pak War
Ravi Rikhye
R
Rugby Rebel
Rugby Rebel
Gerard Siggins
R
Battle at Tenochtitlan
Battle at Tenochtitlan
Kevin Gerard
R
Pacifists' War
Pacifists' War
Lelia Rose Foreman
R
High Above the Waters
High Above the Waters
Gilbert M. Stack
R
The Crimson Hour
The Crimson Hour
Julie Tetel Andresen
R
Cosmic Thunder
Cosmic Thunder
William John Watkins
R
War and Treachery
War and Treachery
D. R. Rosier
R
War
War
JC Andrijeski
R
Last Siege of Haven
Last Siege of Haven
Ty Drago
R
The Memory Singer
The Memory Singer
T. Jackson King
R
Morning Star
Morning Star
Pierce Brown
R
Time Changer
Time Changer
Rich Christiano; Greg Mitchell
R
A Storm of Swords
A Storm of Swords
George R. R. Martin
R
I Dare
I Dare
Sharon Lee; Steve Miller
R
Marduk's Rebellion
Marduk's Rebellion
Jenn Lyons
R
Rugby Warrior
Rugby Warrior
Gerard Siggins
R
The Burden of Indigo
The Burden of Indigo
Gene O'Neill
R
Jungle Temple Oracle
Jungle Temple Oracle
Mark Cheverton
R
Katie's War
Katie's War
Michael Anderle; Michael Todd
R
The Great All-Star Animal League Ball Game
The Great All-Star Animal League Ball Game
Vincent Starrett
R
Warriors of the Light
Warriors of the Light
Larry Ivkovich
R
Kipton and the Ovoid
Kipton and the Ovoid
Charles L. Fontenay
R
Blood Kin
Blood Kin
Ardath Mayhar
R
The Face on the Wall
The Face on the Wall
Carol Barton
R
Dream for Danger
Dream for Danger
Anna Lewins
R