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 Upper Room
The Upper Room
Mary Monroe
R
Raven of Destiny
Raven of Destiny
Peter Tremayne
R
The Second Greatest Story Ever Told
The Second Greatest Story Ever Told
Gorman Bechard
R
Brander's Book
Brander's Book
C. J. Mills
R
The Good Fairies of New York
The Good Fairies of New York
Martin Millar
R
Star Trek: Voyage to Adventure
Star Trek: Voyage to Adventure
Michael J. Dodge
R
The Main Event
The Main Event
Chris Beebee
R
Shadow of the Xel'Naga
Shadow of the Xel'Naga
Gabriel Mesta
R
The Enigma Score
The Enigma Score
Sheri S. Tepper
R
Ravenmoon
Ravenmoon
Peter Tremayne
R
Starluck
Starluck
Donald Wismer
R
Point of Hopes
Point of Hopes
Lisa A. Barnett; Melissa Scott
R
The Empire's Legacy
The Empire's Legacy
Jefferson Swycaffer
R
Fortress of Death
Fortress of Death
Michael McGann
R
Dreams of Dawn
Dreams of Dawn
Marti Steussy
R
Starship
Starship
Kevin D. Randle
R
The Missing Matter
The Missing Matter
Thomas R. McDonough
R
Flies from the Amber
Flies from the Amber
Wil McCarthy
R
Unholy Fire
Unholy Fire
Whitley Strieber
R
The Man Who Risked His Partner
The Man Who Risked His Partner
Reed Stephens
R
Sadar's Keep
Sadar's Keep
Midori Snyder
R
Digital Vampires
Digital Vampires
Laurence Staig
R
The Voice in the Basement
The Voice in the Basement
T. Chris Martindale
R
New Moon
New Moon
Midori Snyder
R
Terminal Games
Terminal Games
Cole Perriman
R
I Feel Like the Morning Star
I Feel Like the Morning Star
Gregory Maguire
R
Rest in Peace
Rest in Peace
Jack MacLane
R
River God
River God
Wilbur Smith
R
Necroscope V: Deadspawn
Necroscope V: Deadspawn
Brian Lumley
R
After the End: A Dystopian Romance Collection Volumes 1-4
After the End: A Dystopian Romance Collection Volumes 1-4
Ali Hazelwood
R