It had me until the end

I don’t know how to rate this. It was a decent medical thriller, with a bit of a slow start but once it got going the premise was truly interesting and gripping,  until the ending. It was abrupt and unsatisfying and didn’t fit with the dark features of the mystery. If I could rewrite the last four chapters I think this would be four stars but as it is? I dunno. I will give it a three for now because I feel very blah about it. 
If this is a series or part one of two it would make more sense but I didn’t get the sense that there is more to the story. I need an epilogue or something because wtf?

I received a complimentary copy of this book from NetGalley, my opinions are my own.