Book excerpt: The natural world experts at National Geographic present the ultimate reference book on reptiles, designed just for kids. Crawling with fascinating facts, lively text, and tons of cool, colorful, images of the weirdest and wackiest reptiles on planet Earth, it is sure to be their coveted, #1 reference. Snakey, slimey, scaley, and sensational Welcome to the amazing world of the most popular reptiles on Earth. With colorful photographs and fun facts, this easy-to-use encyclopedia profiles snakes, lizards, amphibians, turtles and tortoises, crocodilians, and tuatara. Profiles are accompanied by Did You Know? details and fast facts including scientific name, size, diet, and habitat.