Riley Sager does it again. This is definitely his creepiest book yet and I was actually terrified the entire time I was reading. If you are a psychological thriller/horror genre lover, this is a book you must add to your reading list. I also want to note the hidden symbolism/tributes to Stephen King that Sager decided to include in this novel. As someone who loves both authors, I got excited when I stumbled upon these "easter eggs". I am anxiously awaiting Sager's future novels, as it was recently reported that Dutton has agreed to publish three more of his books. Do yourself a favor and get acquainted with Sager's writing as soon as possible.