This text investigates the classification, etiology, and treatment of psychological disorders within the framework of contemporary clinical practice. The authors, Barbara R. Sarason and Lorry Cology, synthesize decades of clinical research and diagnostic criteria to provide a comprehensive overview of abnormal behavior. The book utilizes a biopsychosocial model to explain how biological, psychological, and social factors interact to influence mental health outcomes. It serves as a foundational resource for students and practitioners seeking to understand the complexities of human psychopathology.

Academic reviewers frequently cite this text for its structured approach to complex diagnostic criteria and its clarity in explaining theoretical models. It is widely utilized in undergraduate psychology curricula as a primary reference for understanding the evolution of clinical perspectives.