Instinct and Intelligence in the Animal Kingdom: A Critical Contribution to Modern Animal Psychology (Classic Reprint)

Principles of animal psychology / by N.R.F. Maier and T.C. Schneirla

Do Cats Think? Notes of a cat-watcher

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

The Mentality of Apes

The Mentality of Apes

Animal psychology,: Its nature and its problems (Hutchinson's University Library: Psychology)

The nature of the beast: A popular account of animal psychology from the point of view of a naturalist

An introduction to animal psychology;: The behavior of the rat,

The Mentality of Apes