The treatment of individuals who suffer from both addiction disorders and trauma-related disorders presents therapists with specific challenges in diagnosis and therapy. The cause-and-effect relationship is not always clear. Many questions arise for the therapist, such as: Is the patient experiencing dissociative symptoms or drug intoxication? Are the symptoms attributable to withdrawal or a reactivated post-traumatic stress disorder? The renowned author team provides practical answers based on more than 10 years of therapeutic experience for counseling, outpatient and inpatient treatment, as well as for individual and group therapy. The book includes addiction-specific and trauma-specific resource-oriented therapeutic methods. The manual for group therapy in addiction treatment is based on dialectical-behavioral therapy approaches (DBT).