Frank Endicott is a worrier. He worries about lions, submarines, black holes, leprosy, and armadillos. He lists his worries alphabetically in a notebook and suffers vivid nightmares that even a certain neighborhood pig can't dispatch. When he accompanies Eugenia Lincoln on an errand to duplicate a key at her favorite dark and dusty thrift shop, Frank earns fresh cause for alarm. Odd Buddy Lamp, the shop's proprietor, has sent them home with the original key and its copy. Can Frank come to terms with the mystery without buckling under his mounting dread? .