R rated sci-fi books

5467 books

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

Angels of Darkness
Angels of Darkness
Gav Thorpe
R
The Deep End of Fear
The Deep End of Fear
Elizabeth Chandler
R
The Modular Man
The Modular Man
Roger MacBride Allen
R
The Purification Ceremony
The Purification Ceremony
Mark T. Sullivan
R
The Second Coming
The Second Coming
John Dalmas
R
The Tomorrow Log
The Tomorrow Log
Sharon Lee; Steve Miller
R
Star Viking
Star Viking
Vaughn Heppner
R
Destination Unknown
Destination Unknown
K. A. Applegate
R
Akiko on the Planet Smoo
Akiko on the Planet Smoo
Mark Crilley
R
Alien Dreams
Alien Dreams
Larry Segriff
R
The Eskimo Invasion
The Eskimo Invasion
Hayden Howard
R
The Mirror of Helen
The Mirror of Helen
Richard Purtill
R
A Short History of the Future
A Short History of the Future
W. Warren Wagar
R
The Chess Queen Enigma
The Chess Queen Enigma
Colleen Gleason
R
I Am Not the Other Houdini
I Am Not the Other Houdini
Michael Conner
R
Stark's Crusade
Stark's Crusade
John G. Hemry
R
Khai of Khem
Khai of Khem
Brian Lumley
R
The Movement of Mountains
The Movement of Mountains
Michael Blumlein
R
Darkseid and the Fires of Apokolips
Darkseid and the Fires of Apokolips
Derek Fridolfs
R
A Death of Honor
A Death of Honor
Joe Clifford Faust
R
Moons' Dancing
Moons' Dancing
Marguerite Krause; Susan Sizemore
R
Join My Cult!
Join My Cult!
James Curcio
R
Down Town
Down Town
Tappan King; Viido Polikarpus
R
Damned If You Do
Damned If You Do
Gordon Houghton
R
The Drylands
The Drylands
Mary Rosenblum
R
The Seed
The Seed
Davide de Angelis
R
Beyond
Beyond
Ben R. Games, Ph.D.
R
Acid Rock
Acid Rock
Richard Sapir; Warren Murphy
R
Ghost Class
Ghost Class
Marcia Thornton Jones; Debbie Dadey
R
Charisma
Charisma
Steven Barnes
R