This volume brings together the leaders in the field of PTSD research to present an up-to-date summary and understanding of this complex disorder. All of our current knowledge and controversies concerning the diagnosis, epidemiology, course, pathophysiology and treatment are described in detail. The evidence for efficacy for each of the different forms of psychotherapy and pharmacotherapy is reviewed. Particular attention is paid to at-risk groups, including minorities, and coverage of PTSD throughout the world is reviewed as well. The authors present state-of-the-art findings in genetics, epigenetics, neurotransmitter function and brain imaging to provide the most current and comprehensive review of this burgeoning field.