R rated sci-fi books

5467 books

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

Invasion
Invasion
Jay Bonansinga
R
Khârn Eater of Worlds
Khârn Eater of Worlds
Anthony Reynolds
R
Sargasso of Space
Sargasso of Space
Andrew North
R
Queen
Queen
Aimée Carter
R
Trailer Park Goblins: A Humorous LitRPG Slice-of-Life Adventure
Trailer Park Goblins: A Humorous LitRPG Slice-of-Life Adventure
Micky Carre
R
Hell Difficulty Tutorial: A LitRPG Adventure
Hell Difficulty Tutorial: A LitRPG Adventure
Cerim
R
Another War - Another World
Another War - Another World
Duane A. Booth
R
Ten Years Hence?
Ten Years Hence?
Hannah Coron
R
Begotten of the Demon
Begotten of the Demon
uncredited
R
Devil's Incest Daughter
Devil's Incest Daughter
uncredited
R
Beauty for Ashes
Beauty for Ashes
Kate Clark Brown
R
Bloody War
Bloody War
Terry Grimwood
R
Passages
Passages
Olan Thorensen
R
A Strange Destiny
A Strange Destiny
W. Carlton Dawe
R
\"Down with England!\"
\"Down with England!\"
uncredited
R
The Dog Stars
The Dog Stars
Peter Heller
R
After the End Series (Books 1-7)
After the End Series (Books 1-7)
Sam J. Fires
R
Taken by the Traitor: alien barbarian warrior romance
Taken by the Traitor: alien barbarian warrior romance
Riley Onyx
R
The Milk in the Cocoanut
The Milk in the Cocoanut
W. Barnard Faraday
R
Village of Glass
Village of Glass
Frances Frost
R
War in Space: A Grand Romance of Aircraft Warfare Between France and Germany
War in Space: A Grand Romance of Aircraft Warfare Between France and Germany
Louis Gastine
R
The Professor's Poison
The Professor's Poison
A. G. Macdonell
R
Pride and Prejudice's Vampires
Pride and Prejudice's Vampires
Ann Hassell
R
The King of Cats
The King of Cats
René Guillot
R
Two Worlds (a Man's Career)
Two Worlds (a Man's Career)
Lieut. Col. Andrew C. P. Haggard
R
Jupiter's Passion
Jupiter's Passion
Bruce A. Hawkins
R
The Adult Version of Dracula
The Adult Version of Dracula
uncredited
R
Cohort of the Damned
Cohort of the Damned
Andrew Keith; William H. Keith, Jr.
R
Aillinn o' My Dreams: A Fantasia on Irish Themes
Aillinn o' My Dreams: A Fantasia on Irish Themes
March Laumer
R
The Castle of Saint Donats; or, The History of Jack Smith
The Castle of Saint Donats; or, The History of Jack Smith
uncredited
R