Many millions of years ago, monstrous reptiles roamed Earth—they were the dinosaurs. Some dinosaurs were taller than a house, some were longer than a bus, and many had razor-sharp teeth and sharp talons they used to tear their prey to shreds. This book takes a terrifying and thrilling trip into a long-gone age, when these incredible creatures reigned supreme. From the bone-crunching bite of Tyrannosaurus rex to the slashing claws of Allosaurus, readers will find out all the killer facts they ever wanted to know about these fierce reptile beasts.