There is a very good story here even if somewhat drawn out. It belongs to the serial killer genre, I guess, but there are a lot of psychological games going on to challenge the reader.
Dunne writes very well and there are some great lines and thoughts in the mix. There are some twists and turns too, to keep matters interesting for the most part.
The author leaves a number of issues open, no doubt setting up for a sequel.
The book is quite long and perhaps would have benefited from better editing, including a better proof-read.
I'm surprised this was originally self-published as it certainly beats a lot of what's out there in the crime genre today; with a better editing effort, the sequel may really be something to really look out for. 9/10