This guide takes young readers back in time to an age when dinosaurs ruled the Earth, from gentle Jurassic giants and the terrifying Tyrannosaurus Rex, to fearsome packs of Velociraptors and herds of Hadrosaurs. Full color. Consumable.This guide takes young readers back in time to an age when dinosaurs ruled the Earth, from gentle Jurassic giants and the terrifying Tyrannosaurus Rex, to fearsome packs of Velociraptors and herds of Hadrosaurs. Full color. Consumable.