“Theories of Development: Concepts and Applications” by William Crain is a comprehensive textbook on psychology, specifically focusing on developmental theories. Published by Routledge, this trade paperback book covers various concepts and applications related to development, making it a valuable resource for adult learners and those in further education. With 448 pages, this revised edition offers a thorough exploration of the subject area in English language, catering to the educational needs of a wide range of students.”