Geronimo, Trap, Pandora, Benjamin and Patti return to the era of Louis XIII on the trail of the Pirate Cats. At Fontainebleu Castle they enroll in Richelieu's army of mousketeers and are commanded by the cardinal to oppose two brigands in the area. The mice discover that the brigands are no other than Cattardone and Tersilla who have replaced Louis XIII with Bonzo! Our heroes must find the real Louis XIII and and put him back on the throne.

The Pirate Cats have had their plans foiled by Geronimo Stilton time and time again, due to the help from Geronimo's friend Professor Volt. The Pirate Cats decide to better their offs by getting rid of Professor Volt; kidnapping him and leaving him in the Cretaceous Period – a time when the earth was occupied by dinosaurs! Geronimo and his friends must travel back in time 140 million years to save Professor Volt from literally becoming a part of history!

When Geronimo's nemeses the Pirate Cats try to travel to through time to the year 1889, they accidentally end up in 37993 BC! When the cats meet their Neanderthal ancestors, they hear the legend of a Giant Wooly Mammoth and come up with a plan to capture it and bring it back to the present, making them famous for all time. Geronimo must travel to the Ice Age to stop the cats from changing history forever!

The popular children's story appears in graphic novel form for the first time in the U.S., with stories never seen in America. This time, Geronimo Stilton and friends must travel back in time to Ancient Egypt! The Pirate cats, jealous that the face of a man was placed on the body of the Sphinx, are determined to coerce the Pharaoh into changing the face of this monument. It's up to Geronimo and co. to travel back in time and stop the Pirate Cats before it's too late.

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!

When Geronimo Stilton finds out that the Pirate Cats are going back in time to Venice in the year 1517, he knows they must be after one thing: The Mona Lisa! Geronimo and friends must travel to Renaissance Italy to stop the Pirate Cats from stealing the Mona Lisa and taking credit for what is arguably the world's most famous painting. But the Pirate Cats have an ace up their sleeve: someone in Geronimo's crew is an imposter!

The Pirate Cats are up to no good again! This time, Bonzo and company travel to Rome, Italy in the year 80 AD to the opening of the Colosseum, Rome's largest amphitheater. The evil felines want the world to think it was they who designed the Coliseum, and infiltrate the Senate by posing as nobility. Geronimo and friends must hop into their speedy time machine and expose the cats' wily plot, all the while taking in historical landmarks and breathtaking moments of history.

The Pirate Cats have traveled back to Milan, Italy in the year 1770, in order to steal one of the most important musical works in history: a symphony composed by a young Wolfgang Amadeus Mozart! It's up to Geronimo and his friends to go back in time and stop the Pirate Cats from their dastardly deed!

Athens, Greece: the first Olympic Games are about to take place, and the Pirate Cats have traveled back in time to enter the competition. The fiendish felines plan to win as many events as they can, and become legendary athletes. But these cats aren't exactly in playing shape! In order to gain an edge, they bring all sorts of modern-age sports gear to improve their odds of winning. It's up to Geronimo and the gang to foil their scheme and save history.

The Pirate Cats, led by Tersilla of Catatonia, are hitting Geronimo Stilton where he lives! They have traveled back in time in order to steal Johannes Gutenberg's original printing press! What mad scheme do the Pirate Cats have for the Purr-loined presses? Geronimo Stilton and his friends intend to find out when they travel to the city of Mainz, Germany in the year 1455 to stop the Pirate Cats from tampering with history!