The Handbook of Psychopathy, edited by Christopher J. Patrick and published by The Guilford Press, offers a comprehensive and authoritative review of current knowledge on psychopathy. Now extensively revised with over 65% new material, the second edition explores major theoretical models, symptomatology, diagnostic subtypes, assessment methods, developmental pathways, and causal influences, ranging from genetic and neurobiological factors to environmental variables. The book also delves into the manifestations of psychopathy in specific populations, connections to antisocial behavior and recidivism, as well as contemporary perspectives on prevention and treatment strategies, with special considerations for clinical and forensic practice. New to this edition, it includes contributions from many new authors and topics, expanded coverage of phenotypic facets such as behavioral disinhibition, callous-unemotional traits, and boldness, and chapters on DSM-5, clinical interviewing, cognitive and emotional processing, and serial murder. The volume is significantly updated in its exploration of etiology, assessment methods, neuroimaging research, and adult and juvenile treatment approaches.