R rated sci-fi books
5467 booksSci-fi books with mature content including explicit sex, graphic violence, or strong language. For adult readers.
Slave Trade
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A Hideous Beauty
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The Wonderful Adventures of Phra the Phoenician
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The Black Death
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Midnight Voices
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Thomas Boobig: A Complete Enough Account of His Life and Singular Disappearance
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Times of Trouble
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The Quantum Prophecy
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The Stars Are For Eagles
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Caesar's Column: A Story of the Twentieth Century
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Sleeper
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Strider's Galaxy
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Bloodletter
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Blood and Judgment
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Darkness Falls
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Date with Death
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A Narrative of the Travels and Adventures of Paul Aermont Among the Planets
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Revolution: A Story of the Near Future in England
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Messages from Mars, By the Aid of the Telescope Plant
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The Ion War
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12 to the Moon
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How to Create the Boy of Your Dreams
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Brave the Betrayal
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Planet Wrecker
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Mystery of the Haunted Playhouse
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Crisis at Crystal Reef
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Dream Huntress
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Wraith Squadron
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Sweet Sixteen
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Fourth Reich Death Squad
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