When the Thea sisters travel to New York to visit Pamela's family, who owns a pizzeria, someone threatens to burn the restaurant down, and the five mice must catch the troublemaker and solve the mystery.

When they receive a damaged message in a bottle from the Oofa Oofa rodents in the ancient far north, Geronimo Stiltonord and the micekings set sail to Oofadale but are attacked by a band of dragons while on their voyage.

"The micekings are in a panic. The village's best cook is ill, and until she recovers, there's no delicious stew to eat! Geronimo Stiltonord departs immediately in search of a cure for her, But on the way, he end up snout-to-snout with terrifying dragons! Can he make it back with his fur intact?"--Back cover.

When the Thea Sisters visit Egypt to help look for the legendary ancient Treasure of the Sun, they discover that thieves are also after the hidden treasure, and it's up to the sisters to stop them.

It's the grand opening of Trap's new superstore, but nothing is working: the lights won't turn on, the doors won't open, and the loudspeaker is broken. Geronimo must figure out who's trying to sabotage the event.

"Thea Stilton and the Thea Sisters are needed to help Aquamarina, the magical land of the ocean! The enchanted Music of the Sea has stopped playing, and no one knows why. If it doesn't return soon, the realm will perish! The mouselets and their friend Will Mystery travel to the underwater world to find the magical music. On their mission, they swim through dangerous waters, encounter strange and fantastical creatures, and even reveal an ancient mystery....

"In this fabumouse adventure, the Thea Sisters head to Alaska, where they're attending a conference held by an important ecological association. Their host and his family are native Alaskans, who show the mouselings their favorite games and activities. But soon there's trouble - the Thea Sisters discover that someone is upsetting the ecosystem by blowing up the ice with explosives! Can the Thea Sisters figure out what's going on and save the day?"--Publisher....

"The Thea Sisters are headed to Italy for a ballet competition! But the mouselets aren't just there to dance -- they are there to investigate. A group is plotting to rig the prestigious contest, and the future of their new friend -- an aspiring ballerina -- is at stake! Can the Thea Sisters stop this scheme before it's too late?"--Page [4] of cover.

While visiting a movie set in Hollywood, the Thea sisters set out in search of a thief who has stolen an important reel of film from the studio.

The Thea Sisters travel through Mount Everest to enlist the help of the magical creatures they encounter on their journey to the Cloud Castle, where they are investigating why the clouds are disappearing from the Land of Clouds.