In the Footsteps of Marco Polo is the fourth book in the world bestselling Geronimo Stilton series. Geronimo Stilton lives in the city of Myshania and works as editor-in-chief of the Rodent newspaper, the most famous publication on the whole Mouse Island. More than anything, he loves and appreciates calm. But when the history of the entire planet is threatened by the insidious plans of malicious pirate cats, Geronimo, along with his friends and relatives, boldly goes to the past.