Pleasurable Kingdom: Animals and the Nature of Feeling Good

What's Your Dog's IQ?: How to Determine If Your Dog Is an Einstein--and What to Do If He's a Scooby Doo

Why Does My Dog Act That Way?: A Complete Guide to Your Dog's Personality

Animal Architects: Building and the Evolution of Intelligence

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

The Seven Ages of Man's Best Friend: A Comprehensive Guide for Caring for Your Dog Through All the Stages of Life

Heart in the Wild

The Mentality Of Apes

To Touch a Wild Dolphin

Bats Sing, Mice Giggle: The Secret Lives of Animals