Animal intelligence

The Thinking Ape: The Evolutionary Origins of Intelligence

Intelligence in Nature: An Inquiry Into Knowledge

Ways of Nature

Why Dogs Hump and Bees Get Depressed: The Fascinating Science of Animal Intelligence, Emotions, Friendship, and Conservation

Bats Sing, Mice Giggle: The Surprising Science of Animals' Inner Lives

Second Nature: The Inner Lives of Animals

Devoted Friends: Amazing True Stories about Animals Who Cared

The Gap: The Science of What Separates Us from Other Animals

Thinking Ape: The Evolutionary Origins of Intelligence

Animal Wise: The Thoughts and Emotions of Our Fellow Creatures

The Genius of Birds

Bird Brain: An Exploration of Avian Intelligence

Are We Smart Enough to Know How Smart Animals Are?

Evolution of Intelligence: Are Humans the Only Animals with Minds?

Ways of Nature

Bats Sing, Mice Giggle: The Surprising Science of Animals' Inner Lives

Animal Wise: The Thoughts and Emotions of Our Fellow Creatures

The Intelligence of Dogs: A Guide to the Thoughts, Emotions, and Inner Lives of Our Canine Companions

Bats Sing, Mice Giggle: The Surprising Science of Animals' Inner Lives

Ways of nature

Intelligence of Apes and Other Rational Beings

Origins of Intelligence: The Evolution of Cognitive Development in Monkeys, Apes, and Humans

Animal Architects: Building and the Evolution of Intelligence

Are We Smart Enough to Know How Smart Animals Are?