Dinosaurs The Textbook Author:Spencer G. Lucas Written for an introductory level, one-semester course, Dinosaurs: The Textbook, Second Edition, remains the only undergraduate text of its kind. Authored by respected paleontologist Spencer Lucas, this text provides a strong balance of background, dinosaur classes, and general topics. Combining an easily understood writing style with the latest... more » research, Lucas objectively presents all theories and their contributions to our present knowledge.« less