Earth Abides by George R. StewartZ for Zachariah by Robert C. O'BrienI Am Legend by Richard MathesonDaybreak 2250 A.D. (Star Man's Son) by Andre Norton
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1,242 books — 3,412 voters

Earth Abides by George R. Stewart
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3,769 books — 26,024 voters
Dune by Frank HerbertStranger in a Strange Land by Robert A. HeinleinThe Ultimate Hitchhiker’s Guide to the Galaxy by Douglas AdamsA People’s History of the United States by Howard Zinn
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31,755 books — 120,807 voters

Starship Troopers by Robert A. HeinleinEnder’s Game by Orson Scott CardThe Forever War by Joe HaldemanHammer's Slammers by David DrakeBolo! by David  Weber
Space Opera & Military SF
469 books — 264 voters
Eisenhorn by Dan Abnett
Best Science Fiction of the 21st Century
1,237 books — 8,982 voters

I Am Legend and Other Stories by Richard MathesonEarth Abides by George R. Stewart
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84 books — 130 voters
The Demolished Man by Alfred BesterEarth Abides by George R. StewartDangerous Visions by Harlan EllisonI Have No Mouth & I Must Scream by Harlan EllisonThe Ringworld Engineers by Larry Niven
Best Science Fiction & Fantasy Books
8,482 books — 24,754 voters

The Hitchhiker’s Guide to the Galaxy by Douglas AdamsEnder’s Game by Orson Scott CardDune by Frank HerbertI Am Legend and Other Stories by Richard MathesonStarship Troopers by Robert A. Heinlein
Best Books Ever
76,706 books — 285,111 voters
The Little Prince by Antoine de Saint-ExupéryThe Mists of Avalon by Marion Zimmer BradleyThe Essential Ellison by Harlan EllisonWorld War Z by Max BrooksStranger in a Strange Land by Robert A. Heinlein
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8,468 books — 2,346 voters