R rated sci-fi books

5467 books

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

Blood Legacy
Blood Legacy
Prudence Foster
R
Fomorian Brigade
Fomorian Brigade
James David Victor
R
Dancer's Rise
Dancer's Rise
Jo Clayton
R
The Unwanted
The Unwanted
John Saul
R
The Winds of Mars
The Winds of Mars
H. M. Hoover
R
Punish the Sinners
Punish the Sinners
John Saul
R
The Runes of War
The Runes of War
Jane Welch
R
The Invasion of Falgannon Isle
The Invasion of Falgannon Isle
Deborah MacGillivray
R
Greenfire
Greenfire
Louise Titchener
R
The Twist
The Twist
Richard Calder
R
Away Is a Strange Place to Be
Away Is a Strange Place to Be
H. M. Hoover
R
Seventh Heaven
Seventh Heaven
Alice Hoffman
R
Time, Like an Ever-Rolling Stream
Time, Like an Ever-Rolling Stream
Judith Moffett
R
My Heart Leaps Up
My Heart Leaps Up
R. A. Lafferty
R
The Catiline Conspiracy
The Catiline Conspiracy
John Maddox Roberts
R
Critical Threshold
Critical Threshold
Brian Stableford
R
Rescued from Paradise
Rescued from Paradise
Robert L. Forward; Julie Forward Fuller
R
Flesh Guitar
Flesh Guitar
Geoff Nicholson
R
Rebel Moon
Rebel Moon
Bruce Bethke; Vox Day
R
Carol for Another Christmas
Carol for Another Christmas
Elizabeth Ann Scarborough
R
Wandering Warrior
Wandering Warrior
Da Chen
R
Ship of Dreams
Ship of Dreams
Brian Lumley
R
Unwholly
Unwholly
Neal Shusterman
R
Sabertooth Mountain
Sabertooth Mountain
John Vornholt
R
Into the Fire
Into the Fire
James Rosone;Tc Manning
R
Fated to the Vissigroth
Fated to the Vissigroth
Bella Blair
R
Date with Death
Date with Death
Warren Murphy
R
The Haunt
The Haunt
John Fogarty
R
Shadowborn
Shadowborn
Carrie Bebris; William W. Connors
R
Mississippi Blues
Mississippi Blues
Kathleen Ann Goonan
R