This treatment manual provides mental health professionals with instructions for conducting written exposure therapy (WET) with clients who have posttraumatic stress disorder. WET is a five-session intervention whose brevity and ease of implementation makes it highly accessible to clinicians and clients alike. After reviewing key background information about PTSD symptoms, assessment, and WET's development, this book walks readers through a scripted session-by-session protocol with detailed clinical guidance. Case examples and FAQs demonstrate how to negotiate common challenges that practitioners encounter.