Before the extinction event that changed their world forever, dinosaurs and their reptilian relatives of the sea and sky ruled the prehistoric world. From Allosaurus to Zuniceratops, travel back in time to the age of the dinosaurs with the How It Works Book of Dinosaurs and discover these “terrible lizards” for yourself. Featuring: Most amazing dinosaurs - Get to know some of the most iconic and infamous species around. The prehistoric world - Get to know the environments in which the dinosaurs thrived. Dinosaurs - Meet some of history’s most fascinating and ferocious dinosaur species. Dinosaurs’ legacy - Learn about what caused the dinosaurs to die out and what remains today.