This book details a subject which many writers and publishers find taboo. The author does an excellent job of exploring the psychology of the act of taking a life in a way that is both educational and interesting. While killing is not a topic often discussed, it should be. This book opened many doors in my subconscience and I would highly recommend it to any military and law enforcement personnel as required reading. It is a must read. I salute LtCol Grossman for this excellent work.