This text is intended for a one-quarter or one-semester introductory course on dinosaurs. It is a book that introduces dinosaur biology, geology, and the history of their discovery. It is a text that presents facts together with current ideas, notions, and controversies. Dr. Lucas presents dinosaurs as successful, living creatures that were merely different in appearance from animals living today. The book is designed to be understood by students with little scientific background as it teaches students not only how to use scientific methods, but how to synthesize data to create their own ideas.