Handbook of Hormones: Comparative Endocrinology for Basic and Clinical Research, Second Edition presents a catalog of fundamental information on the structure and function of hormones from basic biology to clinical use, offering a rapid way to obtain specific facts about the chemical and molecular characteristics of hormones, their receptors, signaling pathways, and the biological activities they regulate. The book's stellar editorial board, affiliated with the Japan Society for Comparative Endocrinology, brings together authors that present a compelling structure of each hormone with a consistent presentation that provides a primer surrounding the plethora of hormones that now exist. Comparative endocrinology continues to rapidly expand and new information about hormones is being produced almost daily, making it important to stay up-to-date. Hormone, paracrine, and autocrine factors have been identified as key players in a range of different systems, including immune, musculoskeletal and cardiovascular. Frontiers between disciplines are being blurred and many scientists in fields other than endocrinology are interested in hormones. Scientists now have the unprecedented opportunity to look from invertebrates to vertebrate and identify novel regulatory factors and understand their function and how they determine an organism’s physiology and survival.