Books ordered by title: I
| Author | Title (Number of quotes) |
| Ozzy Osbourne | I Am Ozzy (2) |
| Annaka Harris | I Wonder (3) |
| Isaac Asimov | I, Robot (2) |
| Richard Bach | Illusions (4) |
| Isaac Asimov | In the Beginning (2) |
| Peter Noll | In the Face of Death (8) |
| Mother Teresa | In the Heart of the World (2) |
| Christopher Paolini | Inheritance (4) |
| Meg Cabot | Insatiable (2) |
| Stephen King | Insomnia (3) |
| Oscar Wilde | Intentions (2) |
| Terry Pratchett | Interesting Times (2) |
| Anne Rice | Interview with the Vampire (2) |
| Daniel Dennett | Intuition Pumps and Other Tools for Thinking (12 + 1 quoted) |
| Chuck Palahniuk | Invisible Monsters (6) |
| Stephen King | It (7) |