Field Guide to the Fishes of the Amazon, Orinoco, and Guianas

Gregory S. Paul The Princeton Field Guide to Dinosaurs

Dr. Jose R. Castello Canids of the World

Sharon Chester The Arctic Guide

Rocks and Rock Formations

Birds of Puerto Rico and the Virgin Islands

Common Bees of Eastern North America

Birds of Belize

Birds of Costa Rica

Birds of China

Common Bees of Western North America

Birds of Botswana

Birds of New Guinea

The Princeton Field Guide to Pterosaurs

Bovids of the World

Insects of North America