R rated sci-fi books

5195 books

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

On Stormy Seas
On Stormy Seas
Eric Thomson
R
In Danger's Path
In Danger's Path
W. E. B. Griffin
R
A Fine Madness
A Fine Madness
Kathleen Korbel
R
The Keeper of the Wind
The Keeper of the Wind
Charlotte Boyett-Compo
R
Mermaid's Song
Mermaid's Song
Alida Van Gores
R
The Human Thing
The Human Thing
Kathleen H. Nelson
R
Tainted Blood
Tainted Blood
James M. Thompson
R
The Black Horn
The Black Horn
Clare Cooper
R
Second Eden
Second Eden
Carlton W. Austin
R
The Crystal Portal: Nero's Touch
The Crystal Portal: Nero's Touch
Joyce Holland
R
Third Player
Third Player
Warren James Palmer
R
Betrayer
Betrayer
Aaron Dembski-Bowden
R
Visions in Death
Visions in Death
J. D. Robb
R
The Dark Invaders
The Dark Invaders
Raymond L. Weil
R
The Last Oasis
The Last Oasis
Sue Pace
R
The Witch's Daughter
The Witch's Daughter
Laken Cane
R
Men of War
Men of War
John Schettler
R
Gondez the Monk: A Romance of the Thirteenth Century
Gondez the Monk: A Romance of the Thirteenth Century
William Henry Ireland
R
A. I. Assault
A. I. Assault
Vaughn Heppner
R
War of the Werelords
War of the Werelords
Curtis Jobling
R
Dance with the Devil
Dance with the Devil
Sherrilyn Kenyon
R
Silver Borne
Silver Borne
Patricia Briggs
R
Lover Avenged
Lover Avenged
J. R. Ward
R
Dark Demon
Dark Demon
Christine Feehan
R
A Stitch in Time
A Stitch in Time
Andrew J. Robinson
R
Fire and Ice
Fire and Ice
Erin Hunter
R
Finger-Lickin' Strange
Finger-Lickin' Strange
Jeremy Roberts
R
Shadows Strike
Shadows Strike
Dianne Duvall
R
Roth
Roth
Anna Hackett
R
Seduction in Death
Seduction in Death
J. D. Robb
R