Rat-munching rattlesnakes! I can't believe it. I, Geronimo Stilton, just let my super-sporty friend Bruce Hyena convince me to go on another one of his extreme adventures. You know me — I just can't say no to a friend! This time, we're going to be climbing to the top of the famouse Mount Kilimanjaro in Africa. Moldy mozzarella! I'm in no shape for a mountain climb. How will I ever make it to the top?