Brave New World by Aldous Huxley1984 by George OrwellThe Handmaid’s Tale by Margaret AtwoodThe Road by Cormac McCarthyCloud Atlas by David  Mitchell
Mundane Science Fiction
48 books — 39 voters
1984 by George OrwellFahrenheit 451 by Ray BradburyDune by Frank HerbertThe Hitchhiker’s Guide to the Galaxy by Douglas AdamsThe Foundation Trilogy by Isaac Asimov
Best Science Fiction of the 20th Century
643 books — 487 voters

Ender’s Game by Orson Scott CardThe Hitchhiker's Guide to the Galaxy by Douglas AdamsDune by Frank Herbert1984 by George OrwellFahrenheit 451 by Ray Bradbury
Best Science Fiction
3,860 books — 7,814 voters
Ready Player One by Ernest ClineThe Martian by Andy WeirOld Man's War by John ScalziThe Hunger Games by Suzanne CollinsLeviathan Wakes by James S.A. Corey
Best Science Fiction of the 21st Century
1,199 books — 9,094 voters

The Time Traveler's Wife by Audrey NiffeneggerOutlander by Diana GabaldonThe Time Machine by H.G. Wells11/22/63 by Stephen  KingA Wrinkle in Time by Madeleine L'Engle
Best Time Travel Fiction
2,176 books — 5,457 voters
Old Man's War by John ScalziOn Basilisk Station by David  WeberDauntless by Jack CampbellEnder’s Game by Orson Scott CardStarship Troopers by Robert A. Heinlein
Kick-Ass Military Science Fiction Books
396 books — 297 voters

ReCOgnition by Mark DowsonReCognition by Mark DowsonReCognition - Hypno-Xia, Part 3 by Mark DowsonThe Martian by Andy WeirRendezvous with Rama by Arthur C. Clarke
Ultimate Hard Science Fiction
144 books — 255 voters

ReCOgnition by Mark DowsonReCognition - Hypno-Xia, Part 3 by Mark DowsonThe Three-Body Problem by Liu CixinLOH by Rajeev NandaDune by Frank Herbert
Best Intelligent Sci-Fi
293 books — 349 voters