Gripping. This book is a compilation of interviews with Police Officers, Detectives, Private Detectives, Medical Doctors, Psychologists, Occult Members, and Religious Practitioners. The book was written in the '80s when Heavy Metal was blamed for just about everything that kids did that didn't live up to what people thought was good to do. It was refreshing to know that it wasn't really the music to blame for the atrocious acts written about in these pages. The book covers a lot of what is being exposed today with ritual based sex crimes, robberies, assaults, animal mutilations, murders, and more. I believe this would be a good book for law enforcement officers, or people interested in occult activity. Be warned, the scenes in this book are graphic and may be hard to read for people sensitive to pain, tragedy, violence, death, and more.