The book was amazingly well done. The Author kept my attention the entire 4 days it took me to read it.. Despite having read it when it first came out in 80s I believe, I still recall the vivid imagery and characters like Phila Chief of Police O’Neill, Kalllinger and his Son, and the horrible things done at the hand of this Psychopath! Well worth a read despite it being a dated crime, non fiction.