R rated sci-fi books

5467 books

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

Satan: His Psychotherapy and Cure by the Unfortunate Dr. Kassler, J.S.P.S.
Satan: His Psychotherapy and Cure by the Unfortunate Dr. Kassler, J.S.P.S.
Jeremy Leven
R
Warlords of Jupiter
Warlords of Jupiter
William H. Keith, Jr.
R
Agent of Entropy
Agent of Entropy
Martin Siegel
R
Only Forward
Only Forward
Michael Marshall Smith
R
The Hour of Dust and Ashes
The Hour of Dust and Ashes
Kelly Gay
R
The Infinite and The Divine (Warhammer 40,000)
The Infinite and The Divine (Warhammer 40,000)
Robert Rath
R
Journey to Fusang
Journey to Fusang
William Sanders
R
Redshift Rendezvous
Redshift Rendezvous
John E. Stith
R
Northworld
Northworld
David Drake
R
Mama and the Alien Warrior
Mama and the Alien Warrior
Bex McLynn;Honey Phillips
R
The Thief of Kalimar
The Thief of Kalimar
Graham Diamond
R
Arachne
Arachne
Lisa Mason
R
McGillicuddy McGotham
McGillicuddy McGotham
Leonard Wibberley
R
The Archive Undying
The Archive Undying
Emma Mieko Candon
R
Other
Other
Gordon R. Dickson
R
Home from the Shore
Home from the Shore
Gordon R. Dickson
R
The Daughters Of Man
The Daughters Of Man
JLF Sullivan
R
Ash Ock
Ash Ock
Christopher Hinz
R
Wolfling
Wolfling
Gordon R. Dickson
R
Mutant Chronicles
Mutant Chronicles
Matt Forbeck
R
The Last War: A World Set Free
The Last War: A World Set Free
H. G. Wells
R
Mission to Universe
Mission to Universe
Gordon R. Dickson
R
Loose Change: Let Us Judge Not, That We Be Not Judged
Loose Change: Let Us Judge Not, That We Be Not Judged
Ivan Wainer
R
Land of the Golden Clouds
Land of the Golden Clouds
Archie Weller
R
What Does Woman Want?
What Does Woman Want?
Timothy Leary
R
Masters of Everon
Masters of Everon
Gordon R. Dickson
R
A Murder in Marienburg
A Murder in Marienburg
David Bishop
R
Bloodthirst
Bloodthirst
J. M. Dillard
R
The Castle of Dreams
The Castle of Dreams
Michel Jouvet
R
The Children of Hamelin
The Children of Hamelin
Norman Spinrad
R