Philosophical Investigations by Ludwig WittgensteinTractatus Logico-Philosophicus by Ludwig WittgensteinPoetics by AristotleSumma Theologica by Thomas AquinasThe Consolation of Philosophy by Boethius
Best World Philosophy Book
953 books — 1,419 voters
The Letters of J.R.R. Tolkien by J.R.R. TolkienJ.R.R. Tolkien by Tom ShippeyThe Road to Middle-Earth by Tom ShippeyExploring J.R.R. Tolkien's The Hobbit by Corey OlsenTolkien, Race and Cultural History by Dimitra Fimi
Tolkienology
75 books — 38 voters

Childhood’s End by Arthur C. ClarkeRendezvous with Rama by Arthur C. ClarkeThe Moon Is a Harsh Mistress by Robert A. HeinleinJourney to the Center of the Earth by Jules VerneSpace Trilogy by C.S. Lewis
Best Science Fiction & Fantasy Books
8,488 books — 24,762 voters