Ichnologists--scientists who study dinosaur footprints--have made some amazing discoveries about dinosaur behavior. This friendly, informative book describes those discoveries and explains how the footprints became fossilized. The quiet, conversational style of the text is nicely complemented by the large, clear illustrations. Readers who want to know more about the science of dinosaurs might also want to check out Did Dinosaurs Have Feathers? by the same author and illustrator.