Bests & Worsts Reviews from Amazon

I cannot understand why readers would persist in this book. Everyone is so dysfunctional and disgusting I felt dirty just reading it. It actually is reasonably well-written and gets very good reviews, so I guess that is why I lasted until 37% through, when the protagonist is going to talk to his latest client, a man who killed his girlfriend's 13-month-old son while he was high on drugs. The little boy was crying, so he put his cigarettes out on the bottoms of the little boy's feet, then laid him on the metal protective rack of a hot kerosene heater, and then shook him so hard his brain hemorrhaged. You decide if you want to read this; my answer was NO!