"Key Concepts in Developmental Psychology" by H. Rudolph Schaffer is a textbook published in 2007 by SAGE Publications. The book, aimed at a college audience, covers key concepts in developmental psychology in a clear and concise manner. With 272 pages, this perfect-bound book is a valuable resource for those interested in psychology and development, providing a comprehensive overview of the subject area. Written in English, this textbook is a must-have for students and professionals looking to deepen their understanding of developmental psychology.