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When Sophie starts school, she notices a flyer for a lecture featuring Professor Leo Shattenberg. Could this be their grandfather’s missing cousin, believed to be dead since World War II? At the lecture, Sam and Sophie discover that Professor Shattenberg has a missing person of his own—a childhood sweetheart who, like him, had a love of chocolate. Seeing their chance, the girls offer to help the professor find his missing sweetheart—all the time running their own investigation of him.
192 pages, Paperback
First published June 17, 2004