This was a ride of a book, let me tell you. Every time you think "oh no, that's awful, can't get much worse than that", it said "wait, watch this". I was questioning every character's motives, intentions and their status as good or bad with each interaction with them. Every. Single. Character. This was very well written with a great pace and the perfect amount of description...you know, enough to paint the picture but not so much you're skipping pages to be done with it already. I will absolutely read more from this author, including her series, and I really recommend this one to anyone that is looking for a mystery/thriller that has many elements you don't see coming.
I will warn it's a bit graphic when describing the gore and the assaults etc... so if you're squeamish maybe skip it. I personally thought it added the right amount of tension to the already tight mystery (mysteries?) but some people are not fans of that. Also, if you have triggers, maybe check for trigger tags for this, there are a few things I'm sure are triggering for many.