R rated sci-fi books

5467 books

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

Under Siege
Under Siege
Jessica Meigs
R
Battle Angel
Battle Angel
Scott Speer
R
Ravenwing
Ravenwing
Gav Thorpe
R
The Fourth Round Indo-Pak War
The Fourth Round Indo-Pak War
Ravi Rikhye
R
Battle Pod
Battle Pod
Vaughn Heppner
R
Battle Earth VII
Battle Earth VII
Nick S. Thomas
R
The Siege Scare
The Siege Scare
Frances Watts
R
Lonely is the Knight: Lighthearted Time Travel Romance
Lonely is the Knight: Lighthearted Time Travel Romance
Cynthia Luhrs
R
Ice War
Ice War
Brian Falkner
R
Drakkos the Ocean King
Drakkos the Ocean King
Brandon Robshaw
R
Spice and Wolf, Vol. 13: Side Colors III
Spice and Wolf, Vol. 13: Side Colors III
Isuna Hasekura
R
The Narrow Path to War
The Narrow Path to War
D. L. Frizzell
R
The Fourth Book of Corum: The Bull and the Spear
The Fourth Book of Corum: The Bull and the Spear
Michael Moorcock
R
The Slaves of Votarus
The Slaves of Votarus
Murray Scott Changar
R
H2O
H2O
Virginia Bergin
R
Racso and the Rats of NIMH
Racso and the Rats of NIMH
Jane Leslie Conly
R
Horror Mansion
Horror Mansion
J. N. Williamson
R
Claws
Claws
Henniker Keene
R
Calypso and Strange Lands
Calypso and Strange Lands
Marylou Wheatley
R
Tool of War
Tool of War
Paolo Bacigalupi
R
Steele
Steele
Simon Hawke
R
Jagged Steele
Jagged Steele
Simon Hawke
R
Trail Blazers
Trail Blazers
Joseph L. Thompson
R
Dawn
Dawn
Octavia E. Butler
R
Critical Strike
Critical Strike
Colin F. Barnes; Darren Wearmouth
R
Dead Ice
Dead Ice
David Wood; Steven Savile
R
Before the Invid Storm
Before the Invid Storm
James Luceno
R
Clay
Clay
David Almond
R
The Dark Beyond the Stars
The Dark Beyond the Stars
Frank M. Robinson
R
America 2040
America 2040
Zach Hughes
R