1984 by George OrwellSpace Cadet by Robert A. HeinleinOrphans of the Sky by Robert A. HeinleinRed Planet by Robert A. HeinleinSlan by A.E. van Vogt
Classic Science Fiction - 1940-1949
91 books — 121 voters
Foundation by Isaac AsimovThe Bicentennial Man and Other Stories by Isaac AsimovFantastic Voyage by Isaac AsimovCasebook of the Black Widowers by Isaac AsimovLiar! by Isaac Asimov
Best Asimov Books
88 books — 124 voters

Dune by Frank HerbertThe Foundation Trilogy by Isaac AsimovDo Androids Dream of Electric Sheep? by Philip K. DickStranger in a Strange Land by Robert A. Heinlein2001 by Arthur C. Clarke
Golden Age & New Wave SF
270 books — 207 voters
The Hobbit, or There and Back Again by J.R.R. TolkienWatership Down by Richard  AdamsThe Adventures of Tom Sawyer by Mark TwainThe Chrysalids by John WyndhamThe Hitchhiker’s Guide to the Galaxy by Douglas Adams
Actual Best Books Ever
248 books — 153 voters

Dune by Frank HerbertDivergent by Veronica RothA Canticle for Leibowitz by Walter M. Miller Jr.The Andromeda Strain by Michael CrichtonThe Day of the Triffids by John Wyndham
Genetics in Science Fiction
219 books — 180 voters
The Lion, the Witch and the Wardrobe by C.S. LewisThe Golden Compass by Philip PullmanThe Lathe of Heaven by Ursula K. Le GuinThe Number of the Beast by Robert A. HeinleinSplit Infinity by Piers Anthony
Parallel Universes
304 books — 183 voters

The Moon Is a Harsh Mistress by Robert A. HeinleinAll Systems Red by Martha Wells2001 by Arthur C. ClarkeI, Robot by Isaac Asimov
Computers in Literature
241 books — 242 voters
Glory Road by Robert A. HeinleinThe Moon Is a Harsh Mistress by Robert A. HeinleinHave Space Suit—Will Travel by Robert A. HeinleinCitizen of the Galaxy by Robert A. HeinleinSpace Cadet by Robert A. Heinlein
Your Favorite Heinlein Novel
48 books — 311 voters