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 Seven Days of Cain
The Seven Days of Cain
Ramsey Campbell
R
Patton's Spaceship
Patton's Spaceship
John Barnes
R
The Vengeance of Hera
The Vengeance of Hera
John Gregory Betancourt
R
The Demon Notebook
The Demon Notebook
Erika McGann
R
Stardust Bound
Stardust Bound
Karen Cadora
R
Mystery
Mystery
Peter Straub
R
Holo Men
Holo Men
Stephen Billias
R
Furnace
Furnace
Muriel Gray
R
Flight of the Mariner
Flight of the Mariner
Paul Ware
R
The Pastor
The Pastor
Philip Trewinnard
R
Warrior
Warrior
William F. Wu
R
The Bacta War
The Bacta War
Michael A. Stackpole
R
Spellbinder
Spellbinder
L. J. Smith
R
Huntress
Huntress
L. J. Smith
R
Delta Search
Delta Search
William Shatner
R
The Presence
The Presence
John Saul
R
Ecstasy Club
Ecstasy Club
Douglas Rushkoff
R
Web of the Romulans
Web of the Romulans
M. S. Murdock
R
The Visitor
The Visitor
Christopher Pike
R
The Tears of the Singers
The Tears of the Singers
Melinda Snodgrass
R
The Queen's Captive
The Queen's Captive
Haydn Middleton
R
The Clock of Dreams
The Clock of Dreams
Brian Lumley
R
Monstrum
Monstrum
Donald James
R
Cain
Cain
James Byron Huggins
R
Priests of Mars
Priests of Mars
Graham McNeill
R
Special Powers
Special Powers
Mary Hoffman
R
The Spear
The Spear
James Herbert
R
Portent
Portent
James Herbert
R
The Jonah
The Jonah
James Herbert
R
The Gates of Vensunor
The Gates of Vensunor
Carol Heller
R