Presentation of the author's theory on the connection between multiple personalities disorder (dissociative identity disorder) and recovery of memories of abuse, for therapists.
I'm not qualified to assess the argument, but the book is clearly written and fascinating. He lines up a set of assumptions, from regression and repression to demonic possession and the long term causes of possible infant trauma and knocks them over calmly and logically. Whether it's good medicine is for someone else to judge but it's a thought provoking book.