With the cognitive revolution in human psychology in the 1960s, psychologists interested in animal behavior began to return to a broader set of questions about information processing in animals. Principles of Animal Cognition, by William Roberts, is a systematic, up-to-date review of research in these different areas. Since most students know little about the psychology of non-human species, their eyes will have been opened to the fact that animals perceive the world in complex ways. The text covers a broad range of exciting topics on animal psychology that most undergraduates find of considerable interest. In addition to courses on animal cognition, the text can be used in courses on learning, animal behavior, ethnology, or general cognition. Students will find this text more appealing than standard learning texts because it discusses a broader range of topics on animal psychology. Until now, no textbook that had successfully integrated material from the field of animal cognition, Principles of Animal Cognition, by William Roberts accomplishes this admirably.