R rated sci-fi books

5467 books

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

Exit Sherlock Holmes
Exit Sherlock Holmes
Robert Lee Hall
R
Vanished
Vanished
Kat Richardson
R
Freedom from Freedom Froms
Freedom from Freedom Froms
Titus Stauffer
R
Double Crossing
Double Crossing
Erika Holzer
R
Threshold
Threshold
Eric Flint; Ryk E. Spoor
R
Under the Overtree
Under the Overtree
James A. Moore
R
The Walking
The Walking
Bentley Little
R
Storytellers
Storytellers
Julie Anne Parks
R
Madonna of the Dark
Madonna of the Dark
Elaine Moore
R
Daughters of the Moon
Daughters of the Moon
Joseph Curtin
R
Cuckoo
Cuckoo
Richard Wright
R
Singling Out the Couples
Singling Out the Couples
Stella Duffy
R
The Year the Horses Came
The Year the Horses Came
Mary Mackey
R
A Gathering of Heroes
A Gathering of Heroes
Stephen H. Steel
R
No Doors, No Windows
No Doors, No Windows
Joe Schreiber
R
A Killing Frost
A Killing Frost
John Marsden
R
Altered Starscape
Altered Starscape
William H. Keith, Jr.
R
Fighting Madness
Fighting Madness
P. J. Plauger
R
Chimera
Chimera
Mark W. Tiedemann
R
Mirage
Mirage
Mark W. Tiedemann
R
Atom
Atom
Steve Aylett
R
Dervish Is Digital
Dervish Is Digital
Pat Cadigan
R
The Hidden Arrow of Maether
The Hidden Arrow of Maether
Aiden Beaverson
R
The Song of the Earth
The Song of the Earth
Hugh Nissenson
R
The Night Class
The Night Class
Tom Piccirilli
R
Silver Moons, Black Steel
Silver Moons, Black Steel
Tara K. Harper
R
Voyage of the Star Wolf
Voyage of the Star Wolf
David Gerrold
R
Angelmass
Angelmass
Timothy Zahn
R
Maelstrom
Maelstrom
Peter Watts
R
Colony Fleet
Colony Fleet
Susan R. Matthews
R