Thea Stilton and the Dragon's Code (Geronimo Stilton (Unnumbered Prebound))

FOR USE IN SCHOOLS AND LIBRARIES ONLY. When Geronimo's sister, Thea, is invited to teach a journalism class at a college on Mouse Island, she has no idea that she's going to be called on to help solve a mystery. But when a student disappears, it's up to Thea and five of her students to find o