Post-traumatic stress disorder (PTSD) originated as a diagnostic entity owing to observed negative emotional and behavioural consequences of Vietnam War veterans. PTSD is now understood as the outcome of a wide variety of traumatic experiences, not just those of veterans. This book clearly defines the nature of PTSD, its origins and phenomenological roots, and explores traditional and emerging treatments for this disorder. Traditional treatments have focused on cognitive behaviour therapy and its variants. We have now learned that PTSD is more than a problem of one's dysfunctional cognitions; it encompasses behavioural, emotional, and spiritual aspects as well. As such, healing from PTSD essentially involves a transformation of self and a deep appreciation of the impact of this disorder on all aspects of functioning. The various chapters in this book provide novel insights into where and why PTSD occurs while also addressing traditional and nontraditional interventions.