Oxford Textbook of Psychopathology, 4th Edition by Robert F. Krueger and Paul H. Blaney provides an in-depth examination of psychopathology, combining established research with emerging approaches to understanding mental disorders. The book focuses especially on adult psychopathology and personality disorders while also examining classification, diagnosis, developmental perspectives, genetics, neuroscience, cognition, culture, and environmental influences on psychological disorders. This edition incorporates contemporary frameworks such as the National Institute of Mental Health’s Research Domain Criteria (RDoC) and the Hierarchical Taxonomy of Psychopathology (HiTOP), alongside traditional diagnostic perspectives. Contributions from specialists across clinical psychology and related disciplines provide detailed coverage of major forms of psychopathology and ongoing debates in the field. Designed for advanced psychology students, researchers, clinicians, and mental-health professionals, the textbook offers both theoretical foundations and current research perspectives on the causes, classification, assessment, and understanding of psychological disorders.