Books ordered by author: R
| Author | Title (Number of quotes) |
| Radnóti, Miklós | Clouded Sky (3) |
| Rand, Ayn | Atlas Shrugged (5) |
| Rand, Ayn | The Fountainhead (2) |
| Rice, Anne | Interview with the Vampire (2) |
| Rice, Anne | The Witching Hour (3) |
| Richards, Johnathan | Federal Prison - A comprehensive Survival Guide (2) |
| Ridley, Matt | The Evolution of Everything (4 + 1 quoted) |
| Riordan, Rick | Demigods and Monsters (2) |
| Riordan, Rick | The Lightning Thief (2) |
| Rooney, Andy | Sincerely, Andy Rooney (2) |
| Roosevelt, Eleanor | You Learn by Living (2) |
| Roth, Veronica | Divergent (2) |
| Rovelli, Carlo | The Order of Time (20) |
| Rowling, J. K. | Harry Potter and the Deathly Hallows (3) |
| Rowling, J. K. | Harry Potter and the Order of the Phoenix (2) |
| Rubin, Gretchen | The Happiness Project (3) |
| Rudner, Rita | Tickled Pink (2) |
| Russell, Bertrand | Bertrand Russell on God and Religion (3) |
| Russell, Bertrand | History of Western Philosophy (2) |
| Russell, Bertrand | Mysticism and Logic (2) |
| Russell, Bertrand | Sceptical Essays (3) |
| Russell, Bertrand | The Conquest of Happiness (2) |
| Russell, Bertrand | Why I am Not a Christian (2) |