Geronimo Stilton: The Mysterious Cheese Thief: 13

Cheese niblets! The Stilton Cheesemakers’ Association have demanded that the Stilton family stop using the Stilton name immediately! Cue a trip to England, home of Stilton cheese. But as Geronimo fights to keep his name, a mysterious thief steals all the Stilton in England! Can Geronimo find the thief and learn what it means to be a Stilton?