Geronimo and his friend Hercule Poirat venture into the sewers to find the origin of the horrible stink that is driving all the mice away from New Mouse City--and learn an important lesson about recycling.

This time, Bonzo and his devious cohorts travel to Rome, Italy in the year 80 AD to the opening of the Coliseum, Rome's largest amphitheater. The first part of the evil felines' sinister scheme requires them to infiltrate the Senate by posing as nobility.

What begins as a relaxing vacation turns into a time-traveling adventure, where Geronimo Stilton must travel to Khanbalik, or "The City of Khan" (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 corrupting Marco Polo's famous book "The Travels of Marco Polo," and changing history forever!

"Japan, 1603, Geronimo and his friends don't know why the pirate cats went back to this precise point in time, but they are sure the pirate cats are up to no good! Posing as a traveling troupe of actors, Geronimo somehow manages to convince he locals that he's really a shogun, and not the first samurai! Will Geronimo be able to uncover the pirate cat's plan in time to stop them? Or have the pirate cats finally won?"--From the publisher.