Charles Darwin
| Year | Title | Publisher | ISBN |
| 2003 | The Autobiography of Charles Darwin | Icon Books Ltd | 1840465034 |
| 1999 | The Expression of the Emotions in Man and Animals | Fontana Press | 0006387349 |
| 1989 | The Voyage of the Beagle | Penguin Books Ltd | 014043268X |
| 2004 | The Descent of Man | Penguin Books Ltd | 0140436316 |