R rated sci-fi books

5467 books

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

To Dream in the City of Sorrows
To Dream in the City of Sorrows
Kathryn M. Drennan
R
Atlas 2
Atlas 2
Isaac Hooke
R
Warbots
Warbots
G. Harry Stine
R
Columbus Day
Columbus Day
Craig Alanson
R
The Eternity Key
The Eternity Key
Bree Despain
R
Space Doctor
Space Doctor
G. Harry Stine
R
Deus Ex: The Icarus Effect
Deus Ex: The Icarus Effect
James Swallow
R
The Barbarian
The Barbarian
Barry Sadler
R
The Persian
The Persian
Barry Sadler
R
Fusion
Fusion
Scott Ciencin
R
Twilight of the Mind
Twilight of the Mind
Michael Ely
R
The Sentinel
The Sentinel
Barry Sadler
R
Beasts of Antares
Beasts of Antares
Kenneth Bulmer
R
Silver's Edge
Silver's Edge
Anne Kelleher
R
Old Wounds
Old Wounds
Christie Golden
R
The Quiet Ghost Signal: A Post-Apocalyptic Military Thriller
The Quiet Ghost Signal: A Post-Apocalyptic Military Thriller
Brent Johnston
R
Wind of Truth
Wind of Truth
Ree Soesbee
R
Legacy
Legacy
Glenn R. Sixbury
R
Lunar Interlude
Lunar Interlude
Plum Parrot
R
His Father's Son
His Father's Son
Nigel Bennett; P. N. Elrod
R
Delia of Vallia
Delia of Vallia
Kenneth Bulmer
R
Sidhe-Devil
Sidhe-Devil
Aaron Allston
R
The Adventures of Buckaroo Banzai: Across the Eighth Dimension
The Adventures of Buckaroo Banzai: Across the Eighth Dimension
Earl Mac Rauch
R
Barnabas, Quentin and the Witch's Curse
Barnabas, Quentin and the Witch's Curse
Marilyn Ross
R
Thrice Bound
Thrice Bound
Roberta Gellis
R
Blood Over Bright Haven
Blood Over Bright Haven
M. L. Wang
R
Resurrection Days
Resurrection Days
Wilson Tucker
R
The Man in the Tree
The Man in the Tree
Damon Knight
R
Freedom's Fire Box Set, Books 1-6: The Complete Military Space Opera Series
Freedom's Fire Box Set, Books 1-6: The Complete Military Space Opera Series
Bobby Adair
R
The Edge
The Edge
Catherine Coulter
R