Never underestimate a librarian. Readers learned that lesson with the Prefect’s first adventure (Miss Blaine’s Prefect and the Golden Samovar: marvelous and a laugh-out-loud farce [Publishers Weekly, starred review]). Now a certain Count from Transylvania is about to learn it as well, when the intrepid Shona McMonagle (comfortably padded, in her middle years, and a whiz at obscure martial arts) time-travels to 19th-century France to help a village being menaced by a mysterious killer. It’s true that Dracula’s name has for more than a hundred years been a byword for terror, but nothing can stop an agent trained by the Marcia Blaine School for Girls.