The Soul of All Living Creatures: What Animals Can Teach Us About Being Human
The Emotional Lives of Animals: A Leading Scientist Explores Animal Joy, Sorrow, and Empathy — and Why They Matter
Animal Wise: How We Know Animals Think and Feel
What If?: Serious Scientific Answers to Absurd Hypothetical Questions
Why Dogs Hump and Bees Get Depressed: The Fascinating Science of Animal Intelligence, Emotions, Friendship, and Conservation