Describes the appearance, eating habits, and habitat of hard-headed dinosaurs, including Pachycephalosaurus, Psittacosaurus, Triceratops, Styracosaurus, and Pachyrhinosaurus.

Includes index.

Dinosaurs -- Hard heads -- Pachycephalosaurus -- Psittacosaurus -- Triceratops -- Styracosaurus -- Pachyrhinosaurus -- Names and their meanings.