Phenotypic plasticity is the range and process of variation in body plan and physiology. This book pulls together recent theoretical advances in phenotypic plasticity, as influenced by evolution and development. The editors and the chapter authors are among the leaders of this exciting and active subfield. The volume begins with a primer on the basic principles of the subject, and companion chapters on phenotypic plasticity in plants and animals. Of interest to a wide range of researchers on evolution, development, and their interface.