Ender’s Game by Orson Scott CardDune by Frank Herbert1984 by George OrwellFahrenheit 451 by Ray BradburyBrave New World by Aldous Huxley
Best Science Fiction & Fantasy Books
8,483 books — 24,760 voters
Harry Potter and the Sorcerer's Stone by J.K. RowlingThe Lightning Thief by Rick RiordanThe Hunger Games by Suzanne CollinsTwilight by Stephenie MeyerThe Giver by Lois Lowry
Best Young Adult Books
13,128 books — 80,200 voters

Ender’s Game by Orson Scott CardStarship Troopers by Robert A. HeinleinOld Man's War by John ScalziThe Forever War by Joe HaldemanOn Basilisk Station by David  Weber
Military Science Fiction
840 books — 1,135 voters
To Kill a Mockingbird by Harper Lee1984 by George OrwellHarry Potter and the Sorcerer's Stone by J.K. RowlingAnimal Farm by George OrwellThe Hobbit, or There and Back Again by J.R.R. Tolkien
Best Books of the 20th Century
7,899 books — 49,788 voters