From the description:
"Edward Hunter has it all—a beautiful wife and daughter, a great job, a bright future…and a very dark past. Twenty years ago, New Zealand’s first serial killer was caught, convicted, and locked away in the country’s most hellish of penitentiaries. That man was Edward’s father. Edward has struggled his entire life to put the nightmares of his childhood behind him. But a week before Christmas, violence once again makes an unwelcome appearance into his world. Suddenly he’s going to need the help of his father, a man he hasn’t seen since he was a boy. Is Edward destined to be just like him, to become a man of blood?"
4.7 stars on 18 reviews, with one negative. 340 pages, and this is a buck less than the normal KDD