What Stalks the Deep (Sworn Soldier #3) by T Kingfisher

Available from Nook & Cranny Books when we last checked. Sold from the shop’s own store; the price there is the one that counts.

The next novella in the New York Times bestselling Sworn Soldier series, featuring Alex Easton investigating the dark, mysterious depths of a coal mine in America Alex Easton 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 sworn soldier