The subtitle, The Most Complete Dinosaur Reference Ever, sets its sights high, but this impressive, oversize volume lives up to the claim. Lessem has written more than 40 books on dinosaurs, and in the opening chapter here, he presents broad basics on their behavior and habitats as well as a look at major discoveries in paleontology. However, it's the later chapters, which devote two pages each to specific dinosaurs, that will hook hard-core dino lovers. The etymology of each dinosaur name is explained, and each is written phonetically so that readers can share their newly acquired knowledge with perfect pronunciation. Tempesta's full-page illustrations appear on every spread and jump off the page, and the dynamic layout, with fact boxes, captions, and a main text, is immensely appealing. A concluding 40-page "Dino-Dictionary" keys each dinosaur to its family group and provides additional fodder for dinosaur trivia. Books on this topic are certainly nothing new, but Lessem's comprehensive overview will satisfy the interested browser as much as the ardent dinosaur enthusiast.