I will admit I was a little disappointed in this book because it was advertised as the next installment of the Gretchen Lowell series but Gretchen doesn't make an appearance until the very end. That expectation of her being there helped to make this book not as enjoyable as I anticipated. Don't get me wrong, Cain did a good job grabbing you from the first page with the seeds of the larger mystery that you were going to try to figure out throughout the novel and I liked the pace and how it unfolded and eventually came full circle until every end was tied up. However, I feel that it shouldn't not have been touted as the next in the series because of the lack of Gretchen. Archie and Susan are interesting enough on their own (Susan especially since I am always am eager to hear more about her) that it could have been advertised as an case with them. Read it if nothing else just to get exposed to Cain's wonderful storytelling but if you're going to learn more about who is argurably literary's most notorious female serial killer....wait until the next book.