R rated sci-fi books

5467 books

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

Emerald Sea
Emerald Sea
John Ringo
R
The Hidden Family
The Hidden Family
Charles Stross
R
The Mating Season
The Mating Season
Alex Brunkhorst
R
Paths of Evil
Paths of Evil
Richard C. White
R
The Shadow Within
The Shadow Within
Karen Hancock
R
Close Kin
Close Kin
Clare B. Dunkle
R
Century Rain
Century Rain
Alastair Reynolds
R
Double Trouble
Double Trouble
Miranda Jones
R
The Wind on the Moon
The Wind on the Moon
Eric Linklater
R
Orphanage
Orphanage
Robert Buettner
R
No Rest for the Wicked
No Rest for the Wicked
Kresley Cole
R
The Last Contract of Isako
The Last Contract of Isako
Fonda Lee
R
Lost Truth
Lost Truth
Dawn Cook
R
The Rite
The Rite
Richard Lee Byers
R
Don't Call Me Beanhead!
Don't Call Me Beanhead!
Susan Wojciechowski
R
Scattered Suns
Scattered Suns
Kevin J. Anderson
R
City of Night
City of Night
Ed Gorman; Dean Koontz
R
The Hammer of Eden
The Hammer of Eden
Ken Follett
R
Necklace of Kisses
Necklace of Kisses
Francesca Lia Block
R
From the Earth to the Moon
From the Earth to the Moon
Jules Verne
R
The Strange Adventures of Rangergirl
The Strange Adventures of Rangergirl
Tim Pratt
R
The Mercy of Gods
The Mercy of Gods
James S. A. Corey
R
The Gorgon's Gaze
The Gorgon's Gaze
Julia Golding
R
The Cat Who Saw Red
The Cat Who Saw Red
Lilian Jackson Braun
R
Under the Stone Paw
Under the Stone Paw
Theresa Crater
R
Mind Games
Mind Games
Victor Appleton
R
Slant
Slant
Greg Bear
R
Tom Swift and His Wireless Message
Tom Swift and His Wireless Message
Victor Appleton
R
Caliban's War
Caliban's War
James S. A. Corey
R
Tom Swift and His Triphibian Atomicar
Tom Swift and His Triphibian Atomicar
Victor Appleton, II
R