Psychological Disorders: A Scientist-Practitioner Approach, 5th Edition by Deborah C. Beidel, Danae L. Hudson, and Brooke L. Whisenhunt presents psychological disorders through an evidence-based scientist-practitioner framework that connects clinical practice with contemporary research. The book covers assessment and diagnosis, research methods, anxiety and trauma-related disorders, obsessive-compulsive and impulse-control disorders, mood disorders, eating disorders, substance-related conditions, schizophrenia spectrum disorders, personality disorders, neurodevelopmental disorders, aging, neurocognitive disorders, and legal and ethical issues. Updated for DSM-5-TR, the 5th Edition also emphasizes diversity, stigma reduction, critical evaluation of questionable treatments, and the complex biological, social, and behavioral factors that influence mental health. It is designed for psychology students and readers who want a structured introduction to psychopathology grounded in both scientific evidence and clinical application.