In The Trauma Model, Dr. Ross provides a detailed, scientifically testable method of mental illness. He defines the problem of comorbidity as the central conceptual problem in psychiatry at the beginning of the twenty-first century, then solves it using the logic and predictions of the trauma model. A person with extensive comorbidity suffers from many different psychiatric disorders at the same time including depression, substance abuse, anxiety and eating disorders, psychotic symptoms and personality disorders. Most individuals requiring inpatient psychiatric treatment fit the clinical profile of the trauma model. Dr. Ross also provides a detailed description of trauma therapy, which is suitable for a wide range of addictions, self-destructive behaviors and symptoms. General principles and specific techniques are described and illustrated with dialogue from composite case examples.