A "witty thriller" (The New York Times) for middle-grade readers about how the Mona Lisa was stolen from the Louvre, how the robbery made the portrait the most famous artwork in the world--and how the painting by Leonardo da Vinci should never have existed at all. SIBERT MEDAL WINNER - NAMED ONE OF THE BEST BOOKS OF THE YEAR BY Publishers Weekly - School Library Journal - Booklist - Kirkus Reviews...