Martin introduces readers to the world of ichnology, the study of traces and trace fossils -- such as tracks, trails, burrows, nests, toothmarks, and other vestiges of behavior -- and how by utilizing these clues, scientists explore and intuit the rich and complicated lives of dinosaurs during the Mesozoic era.

Sleuthing dinosaurs -- These feet were made for walking, running, sitting, swimming, herding, and hunting -- The mystery of Lark Quarry -- Dinosaur nests and bringing up babies -- Dinosaurs down underground -- Broken bones, toothmarks, and marks on teeth -- Why would a dinosaur eat a rock? -- The remains of the day : dinosaur vomit, stomach contents, feces, and other gut feelings -- The great Cretaceous walk -- Tracking the dinosaurs among us -- Dinosaurian landscapes and evolutionary traces.