Known by many names, including Boggarts, Brownies, Gallybeggars, Kows, Pixies, and Tom-tumblers, hobgoblins have pervaded human folktales for centuries. In his latest collection of mysterious ancient lore, Professor Berk reveals the proper etiquette for interacting with hobgoblins, indicates their favored hiding places (crawl spaces, curtains, and even shadows), and explains the difference between this usually benevolent creature and his wicked alter...