This text introduces underlying principles of the endocrine regulation of behavior in animals and humans. Every chapter begins by stating a principle, followed by specific examples of hormone actions derived from scientific experiments and clinical observations, and concludes with a few challenging unanswered questions. The reference source Hormones, Brain & Behavior identified this field as rapidly expanding within neurobiology and endocrinology. Now, this well-illustrated and referenced text will serve students from undergraduate school to medical school as they learn this new discipline.