In the introduction, Carr considers such topics as turtle physiology, reproduction, growth, adaptation, and behavior. The introduction also includes discussions of methods for collecting specimens, the evolutionary origins of turtles, and the mythology and folklore surrounding the turtle. The second part of the volume is organized according to keys that give identifying characteristics, life histories, and illustrations of each species. Under headings of geographical range, distinguishing features, description, habitat, habits, breeding, feeding, and economic importance, the volume provides detailed accounts of the various species and subspecies. Throughout Carr offers colorful recollections and anecdotes about his fieldwork and research.