R rated sci-fi books

5467 books

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

War and Treachery
War and Treachery
D. R. Rosier
R
Metallic Love
Metallic Love
Tanith Lee
R
Deus Sanguinius
Deus Sanguinius
James Swallow
R
Phroso
Phroso
Anthony Hope
R
Farryn's War
Farryn's War
Christie Meierz
R
G. A. R. T. H.: Genetically Altered Radically Transformed Human
G. A. R. T. H.: Genetically Altered Radically Transformed Human
R. J. Botelho
R
Singularity
Singularity
Bill DeSmedt
R
The Prince
The Prince
Elizabeth Minogue
R
Ascent
Ascent
Sean Williams; Shane Dix
R
The Iliad
The Iliad
Gillian Cross
R
Mulligan Magic
Mulligan Magic
Deb Stover
R
Fort Sun Dance
Fort Sun Dance
Manly Wade Wellman
R
The Final Cut
The Final Cut
Jasper Bark
R
City of the Dead
City of the Dead
Brian Keene
R
Star Raider
Star Raider
Vaughn Heppner
R
Changer of Days
Changer of Days
Alma Alexander
R
Bold
Bold
Mike Shepherd
R
Cimmerian Rage
Cimmerian Rage
Loren L. Coleman
R
Clever-Lazy: The Girl Who Invented Herself
Clever-Lazy: The Girl Who Invented Herself
Joan Bodger
R
The Monster War
The Monster War
Alan Gratz
R
The Telling Pool
The Telling Pool
David Clement-Davies
R
The Allegiance of Man
The Allegiance of Man
Jane Welch
R
Space Station Mars
Space Station Mars
Daniel San Souci
R
Old Crow
Old Crow
Shena MacKay
R
Alistair Grim's Odd Aquaticum
Alistair Grim's Odd Aquaticum
Gregory Funaro
R
A Journey Into the Human Body
A Journey Into the Human Body
Soo Oh
R
The Hunter's Moon
The Hunter's Moon
David Chandler (I)
R
Marvel's Warriors Three: Godhood's End
Marvel's Warriors Three: Godhood's End
Keith R. A. DeCandido
R
Test of Mettle
Test of Mettle
Isaac Hooke
R
The Idanha Hotel
The Idanha Hotel
Dean Wesley Smith
R