Geronimo Stilton Reporter Volume 9: The Mask of Rat-Jitsu

Geronimo Stilton is invited to a rat-jitsu martial arts championship in a snowy faraway land. With his relatives Thea, Trap, and Benjamin, he covers the event for the Rodent’s Gazette. However, winners of the championship matches disappear mysteriously, and Geronimo must solve the mystery before fear drives him away.