Question:  "Cold North Killers: Canadian Serial Murder" is a 2012 Canadian non-fiction book that documents the lives of sixty Canadian serial killers one of whom was a former what?
Sentence (from "Cold North Killers: Canadian Serial Murder"): Cold North Killers: Canadian Serial Murder is a 2012 Canadian non-fiction book written by Lee Mellor and published by Dundurn Press.
Relevant evidence: Yes