The Lord of the Rings by J.R.R. TolkienLes Misérables by Victor HugoWar and Peace by Leo TolstoyDune by Frank HerbertCryptonomicon by Neal Stephenson
Big Fat Books Worth the Effort
1,874 books — 7,002 voters
Ender’s Game by Orson Scott CardArmor by John SteakleyStarship Troopers by Robert A. HeinleinDauntless by Jack CampbellMarch Upcountry by David  Weber
Military Science Fiction
838 books — 1,133 voters

A Fire Upon the Deep by Vernor Vinge
Excellent Space Opera
1,011 books — 3,573 voters