A curious case for Geronimo! Rancid ricotta! Something strange was happening in New Mouse City. Rodents were suddenly getting sick with stomachaches, hiccups and weird green warts and it seemed to be related to cheese! We mice eat a lot of cheese, so this was serious. My detective friend Hercule Poirat asked me to help him investigate. Could we solve this mystery and save our city? EXTRA! EXTRA! Read an entire bonus Geronimo Stilton story after the main adventure: The Mouse Hoax Can Geronimo uncover the secret of the famouse paintings? PLUS fun and cheesy jokes!