R rated sci-fi books

5467 books

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

Angel Child: A Novel Based on a True Story
Angel Child: A Novel Based on a True Story
Zoe Parry; Jacqueline Austin
R
Asgard
Asgard
Nigel Frith
R
April Ghouls' Day
April Ghouls' Day
Tom B. Stone
R
Attack on the King
Attack on the King
Eric Affabee
R
Blood Tide
Blood Tide
J. D. Cameron
R
Bigby's Curse
Bigby's Curse
Anne Brown
R
Bolo Brigade
Bolo Brigade
William H. Keith, Jr.
R
Cestus Dei
Cestus Dei
John Maddox Roberts
R
Chi and the Giant
Chi and the Giant
John Vornholt
R
Cold in Earth
Cold in Earth
Melissa Jones
R
City of Pearl
City of Pearl
Karen Traviss
R
Circus F.R.E.A.K.S.
Circus F.R.E.A.K.S.
M. T. Coffin
R
Conan and the Mists of Doom
Conan and the Mists of Doom
Roland Green
R
Conqueror's Moon
Conqueror's Moon
Julian May
R
Consequences
Consequences
Kristine Kathryn Rusch
R
Deadly Inheritance
Deadly Inheritance
Fionnuala Reeves
R
Deprivers
Deprivers
Steven-Elliot Altman
R
Disciples of Dread
Disciples of Dread
Hugh B. Cave
R
Don't Close Your Eyes
Don't Close Your Eyes
Robert Ross
R
The Pricker Boy
The Pricker Boy
Reade Scott Whinnem
R
The Year of Disappearances
The Year of Disappearances
Susan Hubbard
R
Fight for Power
Fight for Power
Eric Walters
R
Final Factor
Final Factor
Jessica Palmer
R
Trust Me
Trust Me
Melinda Metz
R
Gifted Touch
Gifted Touch
Melinda Metz
R
Flame War
Flame War
Joshua Quittner; Michelle Slatalla
R
Flesh
Flesh
Gus Weill
R
For More Than Glory
For More Than Glory
William C. Dietz
R
Forgotten Truth
Forgotten Truth
Dawn Cook
R
Maria Looney and the Cosmic Circus
Maria Looney and the Cosmic Circus
Jerome Beatty, Jr.
R