Books ordered by title: W
| Author | Title (Number of quotes) |
| Henry David Thoreau | Walden (23) |
| Leo Tolstoy | War and Peace (2) |
| Paulo Coelho | Warrior of the Light (3) |
| Martin Luther | Watchwords for the warfare of life (2) |
| Paul Arden | Whatever You Think, Think the Opposite (21) |
| Greta Christina | Why Are You Atheists So Angry? (17) |
| Michael Shermer | Why Darwin Matters (3) |
| Bertrand Russell | Why I am Not a Christian (2) |
| Sherry Argov | Why Men Marry Bitches (2) |
| Michael Shermer | Why People Believe Weird Things (4) |
| Glenn Greenwald | Why privacy matters, TEDGlobal 2014 (3) |
| Armin Navabi | Why There Is No God (12 + 1 quoted) |
| Maurice Maeterlinck | Wisdom and Destiny (2) |
| Benjamin Franklin | Wit and Wisdom from Poor Richard`s Almanack (2) |
| Maya Angelou | Wouldn`t Take Nothing for My Journey Now (2) |