Helliconia by Brian W. AldissGateway by Frederik PohlHyperion by Dan Simmons
SF Masterworks
203 books — 724 voters

The Man in the High Castle by Philip K. DickA Canticle for Leibowitz by Walter M. Miller Jr.
Philosophical Science Fiction
441 books — 431 voters

The Remains of the Day by Kazuo IshiguroThe Name of the Rose by Umberto EcoI, Claudius by Robert Graves
Recommended Historical Fiction
3,685 books — 3,613 voters
The Philosophical Breakfast Club by Laura J. SnyderThe Fellowship by John GribbinThe Map That Changed the World by Simon WinchesterThe Disappearing Spoon by Sam KeanThe Ancestor's Tale by Richard Dawkins
History of Science
485 books — 289 voters

The Remains of the Day by Kazuo IshiguroWolf Hall by Hilary Mantel
Booker Prize Winners
63 books — 1,992 voters
The Man in the High Castle by Philip K. DickThe Years of Rice and Salt by Kim Stanley RobinsonDominion by C.J. Sansom
Best Alternate History
359 books — 678 voters

Postcards from Mars by Jim BellA Man on the Moon by Andrew ChaikinRoving Mars  by Steve SquyresThe Case for Mars by Robert Zubrin
Space Race! Books
308 books — 138 voters
A Universe from Nothing by Lawrence M. KraussThe Case for Mars by Robert ZubrinPale Blue Dot by Carl SaganMapping Mars by Oliver MortonGuns, Germs, and Steel by Jared Diamond
Best Science Books - Non-Fiction Only
1,842 books — 3,606 voters

Non-Stop by Brian W. AldissThe Dazzle of Day by Molly GlossThe Clockwork Rocket by Greg EganRendezvous with Rama by Arthur C. Clarke
Interstellar Ark novels
88 books — 82 voters
Helliconia by Brian W. AldissA Canticle for Leibowitz by Walter M. Miller Jr.Anathem by Neal Stephenson
Best Author-Created Religions
102 books — 112 voters

Gateway by Frederik PohlThe Mote in God's Eye by Larry NivenThe Forever War by Joe HaldemanThe High Crusade by Poul AndersonRendezvous with Rama by Arthur C. Clarke
Best Aliens
425 books — 331 voters

Blind Lake by Robert Charles WilsonAnathem by Neal StephensonEvolution by Stephen BaxterIlium by Dan SimmonsPushing Ice by Alastair Reynolds
Best Science Fiction of the 21st Century
1,260 books — 9,050 voters
Gateway by Frederik PohlThe Man in the High Castle by Philip K. DickHyperion by Dan SimmonsRendezvous with Rama by Arthur C. ClarkeThe Fountains of Paradise by Arthur C. Clarke
Favorite Novels Which Won the Hugo Award
85 books — 1,615 voters