When Geronimo's sister, Thea, is invited to teach a journalism class at a college on Mouse Island, she has no idea that she's...

During a marine biology lesson at Mouseford Academy, the Thea Sisters learn about a mysterious shipwreck off Whale Island....

Thea and her friends the Thea Sisters take off for Australia to solve a mystery.

A flock of sheep at Nicky?s family?s ranch is...

Paulina and the Thea Sisters journey to Peru to find their missing archaeologist friend, but as they ascend the Andes Mountains,...

The Thea Sisters are off to Japan on a cultural exchange program. While they're busy exploring Kyoto and admiring the beautiful...

Geronimo's adventurous sister Thea narrates this fabulous adventure that's packed with action, mystery, and friendship!

The...

The Thea Sisters are boarding the famouse Orient Express for a journey from Paris to Istanbul! The train is on a special trip to...

At the beach by Mouseford Academy, the Thea Sisters discover a mysterious boy with blue skin washed up on the shore. He speaks an...

To celebrate Mouseford Academy's 600th anniversary, the headmaster and teachers decide to stage a performance of William...

The Thea Sisters and some friends want to start a school newspaper. Then Colette's diary is missing and sports reporter Nicky,...

Join Thea Stilton and the Thea Sisters in their third magical special edition adventure!

There's a mystery in the land of the...

The Thea Sisters are thrilled about the new performing arts program being offered at Mouseford Academy. That is, until they meet...

The Thea Sisters are learning cool survival techniques, but will that be enough to get them through a perilous night in the woods?

There's going to be a musical at Mouseford, and the students can't stop squeaking about it! Everyone wants a role, but the...

The Thea Sisters are visiting a friend in sunny California, and she invites them to the set of a movie in Hollywood! The mice...

The Thea Sisters are off to Madagascar for Adventure Camp, a wilderness survival competition! The five friends love exploring and...

Thea Stilton and the Thea Sisters are needed to help Aquamarina, the magical land of the ocean! The enchanted Music of the Sea...

One of the Thea Sisters' favorite authors, a famouse mystery writer, has disappeared! To find him, the five mice travel to his...

Their connection to the fantasy worlds is in danger...
Join Thea Stilton and the Thea Sisters as they travel to help a new...

Join Thea Stilton and the Thea Sisters on an adventure packed with mystery and friendship!

The Thea Sisters are taking a trip...

Geronimo's adventurous sister Thea tells the incredible tales of her always exciting travels!

Violet has been chosen to play in the orchestra for a production of Romeo and Juliet in London! The mouselets begin to notice...

Geronimo's adventurous sister Thea tells the incredible tales of her always exciting travels!

The search for the seven secret treasures continues. In this incredible adventure, the Thea Sisters come across the legendary...

The Thea Sisters help their friend Beatrice prepare for the Summer Olympics!

The Thea Sisters' next adventure to the Kingdom of the Fairies!

The Thea Sisters are off to save the rain forest in Malaysia.

The Thea Sisters are taking a road trip across America along Route 66! They stop in Chicago, St. Louis, and other cities on the...

The search for the seven secret treasures continues. In this incredible adventure the Thea Sisters come across the legendary...

The Thea Sisters spend the holidays in Rome!