R rated sci-fi books

5467 books

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

Escape from Exile
Escape from Exile
Robert Levy (I)
R
Nature's God
Nature's God
Robert Anton Wilson
R
Independence Day
Independence Day
Dean Devlin; Roland Emmerich; Stephen Molstad
R
Demon Night
Demon Night
David C. Smith; Richard L. Tierney
R
Farfetch
Farfetch
Jacqueline Lichtenberg
R
Rapture
Rapture
Thomas Tessier
R
Revolt and Rebirth
Revolt and Rebirth
Jefferson P. Swycaffer
R
Torn By War
Torn By War
Jim Melvin
R
Meet Your Match, Cupid Delaney
Meet Your Match, Cupid Delaney
Ellen Leroe
R
The Duke of Sumava
The Duke of Sumava
Sara J. Wrench
R
TekWar
TekWar
William Shatner
R
The Forestwife
The Forestwife
Theresa Tomlinson
R
The Monastery
The Monastery
J. N. Williamson
R
Door Number Three
Door Number Three
Patrick O'Leary
R
The Seventh Equinox
The Seventh Equinox
Matthew Warner
R
The Peacemaker
The Peacemaker
John Remenham
R
In the Moons of Borea
In the Moons of Borea
Brian Lumley
R
The Survivor
The Survivor
James Herbert
R
Voltage
Voltage
Easton Royce
R
Doctor Who and the Underworld
Doctor Who and the Underworld
Terrance Dicks
R
Nights in Ghostland
Nights in Ghostland
Carol Beach York
R
The Devil's Arithmetic
The Devil's Arithmetic
Jane Yolen
R
The Alien Web
The Alien Web
Robert E. Vardeman
R
Death's Acolyte
Death's Acolyte
Geo. W. Proctor; Robert E. Vardeman
R
Beyond the Veil
Beyond the Veil
Janet Morris
R
Return to Camerein
Return to Camerein
Rick Shelley
R
Pillar to the Sky
Pillar to the Sky
William R. Forstchen
R
Professor Dowell's Head
Professor Dowell's Head
Alexander Beliaev
R
Island Bound
Island Bound
Betty Levin
R
Deathstalker Honor
Deathstalker Honor
Simon R. Green
R