Books ordered by title: M
| Author | Title (Number of quotes) |
| Neil Gaiman | M Is for Magic (2) |
| Paulo Coelho | Maktub (4) |
| Jane Austen | Mansfield Park (3) |
| Viktor E. Frankl | Man`s Search for Meaning (4) |
| Marilyn Monroe | Marilyn Monroe in Her Own Words (5) |
| A. C. Grayling | Meditations for the Humanist (5) |
| Arthur Golden | Memoirs of a Geisha (3) |
| Nicholas Sparks | Message in a Bottle (2) |
| Richard Bach | Messiah`s Handbook (3) |
| George Eliot | Middlemarch (3) |
| Stephenie Meyer | Midnight Sun (2) |
| Rupi Kaur | Milk and Honey (4) |
| Theodor W. Adorno | Minima Moralia (2) |
| Buzz Aldrin | Mission to Mars (2) |
| Suzanne Collins | Mockingjay (3) |
| Paul Auster | Moon Palace (2) |
| Joshua Foer | Moonwalking with Einstein (2 + 1 quoted) |
| Douglas Adams | Mostly Harmless (6) |
| May Sarton | Mrs Stevens Hears the Mermaids Singing (2) |
| Jodi Picoult | My Sister`s Keeper (7) |
| Bertrand Russell | Mysticism and Logic (2) |