Meet Stegosaurus, an armored lizard as big as a car with a peanut-sized brain; Pteradon, a flying reptile with an incredible 27-foot wingspan; Protoceratops, named for its giant skull and parrot-like beak, and Oviraptor, its egg-stealing enemy; and Tyrannosaurus, the fiercest carnivore that ever roamed the earth. Forty scientifically accurate drawings depict prehistoric creatures in their natural habitats, accompanied by captions explaining their size, classification, behavior, and other fascinating details.