Geronimo Stilton Vol. 4: Following the Trail of Marco Polo

What begins as a relaxing vacation turns into a time-traveling adventure when Geronimo Stilton must travel to Khanbalik (the modern-day Beijing) in 13th-century China where he encounters Kublai Khan and Marco Polo. This time, Geronimo and friends must stop the Pirate Cats from stealing Marco Polo's famous book and changing history forever!