What Stalks the Deep by T. Kingfisher Book Review Edgar Allan Poe's Fall of the House of Usher .” So that's what book number one is, and that's what kind of drew me into this particular series. I have that one. I've also read the second one, which is What Feasts at Night . So this is the third one, What Stalks the Deep , and I will tell you right off the bat that it's good, but I had a couple of issues with it, which I will explain in a bit. So, let's read the summary. The next installment in the New York Times bestselling Sworn Soldier series features Alex Eastston investigating the dark, mysterious steps of a coal mine in America. Alex Eastston does not want to visit America. They particularly do not want to visit an abandoned coal mine in West Virginia with a reputation for being haunted. But when their old friend, Dr. Denton, summons them to help find his lost cousin who went missing in that very mine, well, sometimes a sworn soldier has to do what a swor...