"At last! An entire book devoted to one of the most recently developed and hottest techniques for the study of dinosaurs and other ancient animals. The author has devoted her career to the study of the histology of fossil bone. She comprehensively surveys a body of literature that begins more than a century ago but is up-to-the-minute as well. She skillfully introduces the student to the basics of the subject but also presses toward the limit of what the technique can tell us about the fascinating topics of growth and physiology of extinct animals. She describes the work of others with fairness but leaves no doubt as to her opinions about the shortcomings of widely cited studies. She writes with clarity and vigor and has presented a book that will be widely read by paleontologists of all levels and leanings. "