R rated sci-fi books

5467 books

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

Max and Me and the Time Machine
Max and Me and the Time Machine
Gery Greer; Bob Ruddick
R
Squadron Alert
Squadron Alert
Roland J. Green
R
What She Does Next Will Astound You
What She Does Next Will Astound You
James Goss
R
Division of the Spoils
Division of the Spoils
Roland J. Green
R
The Sum of Things
The Sum of Things
Roland J. Green
R
Serenity Falls
Serenity Falls
James A. Moore
R
Life on Urth
Life on Urth
John Kirkbride
R
Starkadder
Starkadder
Bernard King
R
The Sky People
The Sky People
Patricia Grace
R
The Shinglo
The Shinglo
Alex Kane (I)
R
The Secret Laboratory Journals of Dr. Victor Frankenstein
The Secret Laboratory Journals of Dr. Victor Frankenstein
Jeremy Kay
R
Summerland
Summerland
L. Dean James
R
The Giant of Inishkerry
The Giant of Inishkerry
Sheila Gilluly
R
The Marked Man
The Marked Man
Charles Ingrid
R
Prisoner of Psi
Prisoner of Psi
Annabel Johnson; Edgar Johnson
R
In the Wrong Hands
In the Wrong Hands
Edward Gibson
R
New Jerusalem
New Jerusalem
Len Jenkin
R
Single Combat
Single Combat
Dean Ing
R
Lot Lizards
Lot Lizards
Ray Garton
R
Soft Targets
Soft Targets
Dean Ing
R
The Artifact
The Artifact
W. Michael Gear
R
To Bathe in Lightning
To Bathe in Lightning
Anne Gay
R
Invaders from Mars
Invaders from Mars
Ray Garton
R
The Lost Domain
The Lost Domain
Martin Hocke
R
Bioblast
Bioblast
Raymond Z. Gallun
R
Follower
Follower
Stephen Gallagher
R
Dark Advent
Dark Advent
Brian Hodge
R
A Most Unlikely Hero, Vol. 13 (Light Novel)
A Most Unlikely Hero, Vol. 13 (Light Novel)
Brandon Varnell
R
Before the Storm
Before the Storm
Michael P. Kube-McDowell
R
The Kingmaking
The Kingmaking
Helen Hollick
R