R rated sci-fi books
5467 booksSci-fi books with mature content including explicit sex, graphic violence, or strong language. For adult readers.
Blood Meteor
RNuclear Deterrent
RHigh Noon Cyborg (Cyborgs on Mars)
RRok's Captive: A Fated Mates Alien Romance
RIsolation: A Post-Apocalyptic Survival Novel
RHunger: The Complete Trilogy
RThe Lone Cyborg (Cyborgs on Mars)
RXara and the Xenobeast: A SciFi Alien Romance
RRed Ocean: A Deep Sea Thriller
REinar: Brigands of Ruk
RSlaughterhouse-Five: A Novel
RMane Attraction
RHead of the Class: A LitRPG Adventure
RObelisk
RManifest Fantasy
RRogue: A Sci-Fi Superhero Origin Story
RPike's Passage
RThe Iron Fleet: Books 1-3 (An Epic Military Science Fiction Box Set)
RThe Tomorrow Testament
RThe Ice Raid
RDark Crusade
RResurrection, Inc.
RThe Coachman Rat
RInvasion
RDancer of Gor
RHardcase
RThe Imperium Game
RFear Book
RExcavation
RThe Eclipse of Dawn
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