The Karate Mouse, the 40th book in the Geronimo Stilton series of children?s books, takes readers through yet another adventure in the exciting life of Geronimo, the mouse. Geronimo is a journalist for the fictional newspaper, The Rodent?s Gazette, and lives in Mouse City with other mice characters from the book. The homely, peace-loving Geronimo gets swept into a World Karate Championship by his enthusiastic friends. Geronimo has only a week to prepare for the championship along with Bruce Hyena and Piccolo Tao, Bruce?s athletic cousin. What follows next sets the tone for the uphill task that Geronimo is about to face.