The God Delusion by Richard DawkinsGod Is Not Great by Christopher HitchensThe Demon-Haunted World by Carl SaganThe End of Faith by Sam HarrisLetter to a Christian Nation by Sam Harris
Notable Atheist Books
583 books — 995 voters
Animal, Vegetable, Miracle by Barbara KingsolverThe Omnivore's Dilemma by Michael PollanThis Changes Everything by Naomi KleinStories on the Trail of a Yankee Millwright Seeing the Past by James T.  PowersSaving the Farm by James T.  Powers
Best Sustainability Nonfiction
420 books — 319 voters

Silent Spring by Rachel CarsonA Sand County Almanac and Sketches Here and There by Aldo LeopoldThe Lorax by Dr. SeussThe Omnivore's Dilemma by Michael PollanDesert Solitaire by Edward Abbey
Best Environmental Books
1,088 books — 1,234 voters
Harry Potter and the Philosopher’s Stone by J.K. RowlingThe Hobbit, or There and Back Again by J.R.R. TolkienThe Lord of the Rings by J.R.R. TolkienThe Lion, the Witch and the Wardrobe by C.S. LewisThe Hunger Games by Suzanne Collins
Most Interesting World
8,169 books — 4,887 voters