An easily read pictorial review of information to be gleaned from dinosaur tracks, including some recent conjectures concerning how fast dinosaurs walked and ran. Entertaining, instructive, and full of intriguing solutions to puzzles like why a sauropod appears to have walked on just his front legs, or how hadrosaur tracks got on the roof of a cave. The cheerful pictures are enlivened by a merry trio of kids assisting a white-haired paleontologist. Notes on dinosaur names. (Nonfiction 8+)