Miss Blaine's Prefect and the Weird Sisters

A resourceful middle-aged Scottish librarian travels back in time to stop Macbeth and his wife from killing Duncan while avoiding three dangerous witches. Shona McMonagle is your ordinary, garden-variety librarian: comfortably padded, in her middle years, expert in various arcane martial arts. She also has an impressive knack for time travel (“impressive” may be overstating things: her first two forays—revolutionary Russia, 19th-century France—went less than smoothly). Her latest mission? Head t