In this book, the authors gather and present new research in the study of post-traumatic stress disorder. Topics discussed include the diverse emotional consequences and treatment needs of sexual assault and intimate partner violence survivors; PTSD among visible and invisible electrically injured outpatients; early life stress and emotional vulnerability; delayed effects of repeated inescapable severe stress on brain cannabinoid receptor expression and acoustic startle response in adolescent male rats; suicidal ideation associated with PCL checklist-ascertained PTSD among veterans treated for substance abuse; and veterans’ engagement in psychotherapy for PTSD.