"Theories of Development: Concepts and Applications" by William Crain is a comprehensive textbook focusing on psychology and developmental theories. Published by Routledge, this revised edition in trade paperback format covers various concepts and applications in the field of development. With 448 pages, this book is designed for adult education and further education levels, making it an essential resource for those studying psychology and related disciplines. Written in English, this book offers a detailed exploration of various theories of development, making it a valuable addition to any educational library.