Thus Spoke Zarathustra by Friedrich NietzscheThe Republic by PlatoCritique of Pure Reason by Immanuel KantMeditations by Marcus AureliusFrom Darkness Into Light by A. Helwa
Best World Philosophy Book
953 books — 1,419 voters
The Devil in the White City by Erik LarsonFreakonomics by Steven D. LevittA Short History of Nearly Everything by Bill BrysonGuns, Germs, and Steel by Jared DiamondOutliers by Malcolm Gladwell
Best Non-Fiction (no biographies)
6,239 books — 8,069 voters

A Short History of Nearly Everything by Bill BrysonA Brief History of Time by Stephen W. HawkingCosmos by Carl SaganThe Selfish Gene by Richard DawkinsGuns, Germs, and Steel by Jared Diamond
Best Science Books - Non-Fiction Only
1,839 books — 3,602 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

To Kill a Mockingbird by Harper LeePride and Prejudice by Jane AustenJane Eyre by Charlotte BrontëThe Diary of a Young Girl by Anne FrankThe Handmaid’s Tale by Margaret Atwood
Best Woman-Authored Books
8,287 books — 5,251 voters

Frankenstein by Mary Wollstonecraft ShelleyA Streetcar Named Desire by Tennessee WilliamsLady Chatterley’s Lover by D.H. LawrenceLove In The Time Of Cholera by Gabriel García MárquezDelta of Venus by Anaïs Nin
Nudes
580 books — 79 voters

The Hunger Games by Suzanne CollinsPride and Prejudice by Jane AustenTo Kill a Mockingbird by Harper LeeHarry Potter and the Order of the Phoenix by J.K. RowlingThe Book Thief by Markus Zusak
Best Books Ever
76,726 books — 285,375 voters
Fingersmith by Sarah WatersTipping the Velvet by Sarah WatersAnnie on My Mind by Nancy GardenFried Green Tomatoes at the Whistle Stop Cafe by Fannie FlaggThe Price of Salt by Claire  Morgan
Best Lesbian Fiction
2,027 books — 2,651 voters