Geronimo Stilton #22: The Secret of Cacklefur Castle Moldy mozzarella, it was every mouse's worst nightmare! My old friend Creepella von Cacklefur called me one night and ordered me to join her for the weekend at her family's spooky castle. And before I could say "boo!" she'd mouse-napped me! Now I was stuck in the gloomiest, eeriest castle I'd ever seen. Even worse, I was surrounded by Creepella's creepy family! Oh, would I ever escape back to my safe, cozy mouse hole in New Mouse City? Geronimo Stilton #24: Field Trip to Niagara Falls Holey cheese, what an adventure! I was off to Niagara Falls with my nephew Benjamin's class. It was a beautiful place -- truly one of the most amazing sights I'd ever seen. But unfortunately, I was surrounded by mischievous young mouselets who were determined to send me over the Falls in a barrel! Oh, would I ever make it back to Mouse Island alive?