The Overnight Guest

While certainly a page-turner, the book stumbled a bit towards the end. I don't think the final revelations are truly earned by the previous text. Certainly, a thriller should throw a surprise at the reader, but upon looking back at the previous chapters, it should feel like the answer was there and we didn't see it. I don't believe that is the case here. There are also a number of grammatical choices that are counter to what we all learned in school (sentence fragments, comma splices, etc.) which pulled me from the story at times.