Geronimo Stilton Cavemice #10: My Autosaurus Will Win

It's the start of an exciting cave mice contest: a race to Boulder Bay and back! It's a dangerous route, but it will supply the village cheese maker with rare hot lava peppers, and there's a big cash prize. Trap teams up with Geronimo -- who has a lazy, slow, city autosaurus (the cave mice mode of transportation). Can they reach the finish line without going extinct on the way?