R rated sci-fi books

5467 books

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

Beauty's Release
Beauty's Release
A. N. Roquelaure
R
Witchling
Witchling
Yasmine Galenorn
R
Slan Hunter
Slan Hunter
A. E. van Vogt; Kevin J. Anderson
R
Starfighters of Adumar
Starfighters of Adumar
Aaron Allston
R
Cat on a Hyacinth Hunt
Cat on a Hyacinth Hunt
Carole Nelson Douglas
R
Spacecamp
Spacecamp
Joe Claro
R
Maximum Warp: Book Two of Two
Maximum Warp: Book Two of Two
Dave Galanter; Greg Brodeur
R
The Secret of the Ninth Planet
The Secret of the Ninth Planet
Donald A. Wollheim
R
The Third Lynx
The Third Lynx
Timothy Zahn
R
End of Days
End of Days
Frank Lauria
R
Spinners
Spinners
Donna Jo Napoli; Richard Tchen
R
Shadowbridge
Shadowbridge
Gregory Frost
R
Implied Spaces
Implied Spaces
Walter Jon Williams
R
Enemies
Enemies
Emily Devenport
R
Lone Star Planet
Lone Star Planet
H. Beam Piper; John J. McGuire
R
The Time of the Hawklords
The Time of the Hawklords
Michael Moorcock; Michael Butterworth
R
Paul of Dune
Paul of Dune
Brian Herbert; Kevin J. Anderson
R
Cyberia
Cyberia
Chris Lynch
R
The Way of Shadows
The Way of Shadows
Brent Weeks
R
The Fire Rose
The Fire Rose
Richard A. Knaak
R
Blackbird House
Blackbird House
Alice Hoffman
R
Horizon
Horizon
Lois McMaster Bujold
R
This Is Not a Game
This Is Not a Game
Walter Jon Williams
R
The Door to December
The Door to December
Dean Koontz
R
Lover Avenged
Lover Avenged
J. R. Ward
R
Faery Moon
Faery Moon
P. R. Frost
R
Child of Fire
Child of Fire
Harry Connolly
R
Cobweb
Cobweb
Frederick George; Neal Stephenson
R
Defiance of the Fall 8
Defiance of the Fall 8
TheFirstDefier
R
Canticle
Canticle
Ken Scholes
R