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 Labyrinth
The Labyrinth
Robert Holdstock
R
Free Zone
Free Zone
Charles Platt
R
The Lion: Son of the Forest (Warhammer 40,000)
The Lion: Son of the Forest (Warhammer 40,000)
Mike Brooks
R
Hot Time in Old Town
Hot Time in Old Town
Mike McQuay
R
Nightingale's Lament
Nightingale's Lament
Simon R. Green
R
Lucky Day
Lucky Day
Chuck Tingle
R
Wren to the Rescue
Wren to the Rescue
Sherwood Smith
R
Iron Bullet
Iron Bullet
Birdy Bow
R
The Diamond Contessa
The Diamond Contessa
Kenneth Bulmer
R
Arena of Antares
Arena of Antares
Kenneth Bulmer
R
Dr. Adder
Dr. Adder
K. W. Jeter
R
Who P-P-Plugged Roger Rabbit?
Who P-P-Plugged Roger Rabbit?
Gary K. Wolf
R
The Teacher's Solution
The Teacher's Solution
Joe Ryan
R
Angels in Savannah: A Modern Day Fantasy
Angels in Savannah: A Modern Day Fantasy
C. J. Condon
R
Starchild
Starchild
Katriena Knights
R
The Sacred Land
The Sacred Land
Harry Turtledove
R
Ursun's Teeth
Ursun's Teeth
Graham McNeill
R
Coyote Moon
Coyote Moon
John Vornholt
R
The Blood Hunters
The Blood Hunters
Katherine Ramsland
R
A Sense of Shadow
A Sense of Shadow
Kate Wilhelm
R
City of Baraboo
City of Baraboo
Barry B. Longyear
R
Banewreaker
Banewreaker
Jacqueline Carey
R
Master of the Cauldron
Master of the Cauldron
David Drake
R
Bonds of Hercules
Bonds of Hercules
Jasmine Mas
R
National Lampoon's Doon
National Lampoon's Doon
Ellis Weiner
R
World Without End
World Without End
Joe Haldeman
R
Junktion
Junktion
Matthew Farrer
R
Ciaphas Cain: The Anthology: Ciaphas Cain: Warhammer 40,000
Ciaphas Cain: The Anthology: Ciaphas Cain: Warhammer 40,000
Sandy Mitchell
R
The Star Fraction
The Star Fraction
Ken MacLeod
R
Alpha Centauri or Die!
Alpha Centauri or Die!
Leigh Brackett
R