| title | ISBN-13 | year of publication |
|---|---|---|
| The Animal Manifesto: Six Reasons for Expanding Our Compassion Footprint | 978-1-57731-649-7 | 2010 |
| The Emotional Lives of Animals: A Leading Scientist Explores Animal Joy, Sorrow, and Empathy - and Why They Matter | 978-1-57731-629-9 | 2008 |
| The Emotional Lives of Animals: A Leading Scientist Explores Animal Joy, Sorrow, and Empathy — and Why They Matter | 978-1-57731-502-5 | 2007 |
| Why Dogs Hump and Bees Get Depressed: The Fascinating Science of Animal Intelligence, Emotions, Friendship, and Conservation | 978-1-60868-219-5 | 2013 |