This book is handy for those who want to identify Costa Rican mammals, but it is especially appropriate for anyone who wishes to go beyond the simple question of "What's that?" It contains a wealth of natural history information on mammals' feeding, defecating, and sexual behavior. The author also describes ecological interactions and conservation issues. Hundreds of superb illustrations depict portraits of the animals as well as behaviors, food plants, and interesting details such as scats and penis bones. While the book focuses on species within Costa Rica, much of the information applies to mammals in Central America in general. The Natural History of Costa Rican Mammals serves as a fine reference book and a fun-to-read book at the same time.