It’s incredible to think that crocodiles were contemporaries of the dinosaurs. Not all crocs looked like the creatures we know today, though. Some were real monsters–such as Machimosaurus rex. It was 30 feet (10 m) long! Reptile lovers and dinosaur enthusiasts will love the details and images found in this high-interest book. They’ll also review important science concepts, such as adaptation and extinction, and relish sharing the fascinating facts they absorb with their friends!