This widely used professional development resource and course text provides an engaging overview of developmental theory and research, with a focus on what practitioners need to know. The author explains how children's trajectories are shaped by transactions among early relationships, brain development, and the social environment. Developmental processes of infancy, toddlerhood, the preschool years, and middle childhood are described. The book shows how children in each age range typically behave, think, and relate to others, and what happens when development goes awry. It demonstrates effective ways to apply developmental knowledge to clinical assessment and intervention. Vivid case examples, observation exercises, and quick-reference tables facilitate learning. This title incorporates the latest research on the developing brain, attachment, risk and protective factors, and all domains of development neuroscience information is more fully integrated throughout new material on preadolescence, foster care, trauma, and social policy expanded discussions of developmentally appropriate interventions, including new case examples. This book will be important reading for practitioners and students in social work, clinical child and school psychology, psychiatry, family therapy, counseling, and nursing. It will also serves as a text in undergraduate- and graduate-level courses such as Human Behavior and the Social Environment, Human Development, and Child Counseling and Psychotherapy, and in psychiatric residency programs.