When his journalistic rival, the editor-in-chief of The Daily Rat, goes missing, Geronimo Stilton teams up with ace reporter Simon Squealer to determine if the notorious mobster Barry the Mustache is behind the disappearance or if fake news has cast suspicion on the wrong rat.

"Geronimo Stilton is invited to a rat-jitsu martial arts championship in a snowy faraway land, much to the famouse reporters surprise. With his helpful relatives, Thea, Trap and Benjamin, Geronimo goes to cover the event for the Rodent's Gazette. But something strange is happening. After each championship match, the winner disappears without a trace! Will Geronimo get involved and solve the mystery of the missing martial artists? Or will he be consumed...

Traveling to 1896 Paris, Geronimo and his friends try to stop the Pirate Cats from stealing the first cinematograph, an invention that ushered in the age of motion pictures.

"Geronimo has to make sure he doesn't sleep on the job when dealing with his next case! Geronimo Stilton, crusading news reporter and editor of The Rodent's Gazette, has been working too much and is in desperate need of a break. He is getting sleepy, very sleepy, but he can't actually fall asleep. Geronimo's cousin Trap tells him about a specialist, the Great Ratswami, who hypnotizes mice to help them relax. Shortly after Geronimo's meeting with...