All The Way Down is an ingenious information book series that looks at different ecosystems, from the organisms that live near the top to the creatures that dwell near the bottom. Dinosaurs and Other Prehistoric Creatures explores the vanished world of these ancient animals. It descends through the different time periods in which they lived--Triassic, Jurassic, and Cretacious--and down from the flying reptiles that soared through the skies to the dinosaurs that roamed the ground and the predators that hunted in the planet's teeming, dangerous oceans. The book also explores the various theories about how the dinosaurs became extinct and looks at how paleontologists have used fossils to piece together their lives. Each spread features bold, colorful, and eye-catching illustrations of the different dinosaur species, plus easy-to-digest, bite-sized factoids about the creatures. A ruler running down the side of each spread highlights the different depths of each scene.