A stinky smell is taking over New Mouse City! No mouse can live like this! Geronimo and his best friend Hercule, the private detective, head underground into the sewer world of Mouse Island to investigate. Can they save the city from the stench?

This is all-new Geronimo Stilton as interpreted by author, artist, and longtime fan Tom Angleberger. Tom is a New York Times, USA Today, and Wall Street Journal bestselling author.