The dinosaurs of the Upper Jurassic were larger than ever before, including the first birds and incredible sea creatures. The most amazing dinosaurs and reptiles of this period are also revealed to readers, uncovering fascinating facts about the history along the way. Readers come face-to-face with the most ferocious predator of its time, Allosaurus, as well as other feared hunters and huge herbivores. Using cutting-edge technology and helpful scale renderings, the impressive artwork in this book takes readers into the prehistoric world in a fresh, captivating way.