Very interesting. Great idea.
I actually prefer killers that are younger(the one in this book is 60) because then u have in mind that they can still do so much to the world, in a bad way of course 🙂
Anyway I liked the story and that the three woman made a plan and actually get what they wanted, their life back by threatening the “wolve”.
The end is also interesting but I dont think that in real life a psychopath or killer would really not kill them just because they threaten him with saying they reveal the truth about him and his past, where he killed several people.