I've come to the conclusion that Stephen Graham Jones just isn't for me. 

On paper, his books should be exactly the kinds of stories I'd love reading, but for some reason, I just don't enjoy them.

I often love the ideas behind his stories, but there's something about the way he executes them that just doesn't work for me.

I did finish this book, unlike the previous two, but it was more out of laziness (I didn't want to get up and stop the audiobook) than enjoyment.

The best way I can explain reading this book is to describe it as being analogous to watching a movie that someone has already told you the entire plot for. That's how this book felt. You knew what was happening from early on, and then it was just a heap of internal monologuing by the protagonist as they set about doing it. 

I usually enjoy unreliable narrators, but this one was just so blatantly obvious that there was never any real doubt as to what was going on. I couldn't find any horror elements beyond the fact that people were occasionally being murdered either.

Also, the title annoys me since there's only one mannequin and the events occur over several days.