Instruct: Classify Amazon reviews into positive or negative sentiment
Query: The Ice Man: Confessions of a Mafia Contract Killer

This book traces the life of a psychopath killer from childhood to death. It gives you an inside look into the probable causes of a psychopath beginning with childhood, but progresses beyond just killing. Richard Kuklinsky was the Dean of psychos who made killing a profitable business by hiring out to all of the Mafia families. Yet, he expresses compassion towards his family at times and would never kill a female or child.His study of death and experiments with killing will keep you on the edge. Just when you think he's done it all, he comes up with more.