I am a fan of Bentley. This is ok. Not the best though. Story with a little simplistic and relied heavily on a popular concept in 1992. I guess he watched Rain Man and said “Hey, what if a guy like that was a serial killer?”
As for the prolific use of the R Word….
I would cut him slack because it was 1992, but the main character at the beginning of the book identifies how it was not an appropriate word to use anymore…in 92…, nonetheless he decided to roll with it all the way through.

I guess if people are not bothered by that not much is changed in 30 years. It’s no reason to not listen to the book. Or is it. I have no idea. I did.