In “The Small Hands of Chokedamp,” Josiah Bancroft gives us the first glimpse of the world of The Hexologists, his upcoming novel. Isolde Wilby, captain of the newly minted Office of Ensorcelled Investigations, is on a merry chase when she happens upon an unlikely suspect: a potter smuggling a doll’s arm that radiates magic. Captain Wilby’s investigation is soon derailed by wealthy interests who underestimate her resolve. Finding herself far from help or the light of day, Isolde has little choice but to rely upon her wits, her hexes, and her bag of charmed relics to help her unravel the potter’s plot.