Most Popular Books by Thea Stilton

The Thea Sisters are on a new adventure that begins when they discover a diary belonging to an old explorer. It tells the legend of seven mysterious treasures. The girls find themselves on a search for the first treasure: the mythical Ivory Garden.

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 the mouselets' new friend an aspiring b

Join Thea Stilton and the Thea Sisters on an adventure packed with mystery and friendship! The Thea Sisters head to Capri for a new adventure!

The Thea Sisters have been invited to Egypt to participate in an archeological excavation. They are helping to look for the legendary ancient Treasure of the Sun. A precious blue stone scarab may be the key to their search, but they also discover tha

Colette has been selected to plan a student-run fashion show at Mouseford Academy, and her friends the Thea Sisters rally around to help. There's a runway to build, fashion bloggers to invite, and clothes to design. And as usual, diva mouse Ruby Flashyfur has a plan to land herself in the spotlight. Will she succeed, or will Colette and the Thea Sisters come out on top?

"The Thea Sisters are going to New Zealand! Their new friend Charlotte wants to show them the sights, and introduce them to Didi, a skeleton of a bird that went extinct many years ago. But when they get to the mouseum, Didi has gone missing! Can they find the stolen skeleton before it is too late?"--

When the sheep on Nicky's family's ranch start losing their wool, the Thea Sisters head to Australia to investigate.

The underwater kingdom of Aquamarina is in trouble because the enchanted Music of the Sea has stopped playing--so Thea and the Thea Sisters, together with their friend Will Mystery set out on a dangerous mission to find the Sea Violin which will restore color and life to the Kingdom.

Mouseford Academy is celebrating their 600th anniversary and the headmaster and teachers decide to put on a play of the famous Mouseo and Juliet. The Thea Sisters want the role of Juliet but so does their rival, Ruby Flashyfur.

While attending the Festival of Time in Germany, the Thea sisters investigate the theft of a famous clock.

Join Thea Stilton and the Thea Sisters on an adventure packed with mystery and friendship! The Thea Sisters spend the holidays in Rome!

When the Thea Sisters' friend Bridget returns to Scotland for a family emergency, the five mice offer to help. And when Bridget goes missing, they have to rush to Scotland to find her! Along the way, the Thea Sisters encounter Celtic legends, cryptic messages, and hidden treasures on a trip that's full of surprises!

On summer vacation in Scotland, the Thea sisters are intrigued by a tapestry that is really a treasure map supposedly leading to a hidden alabaster garden where an ancient treasure is buried, and the story of Aurora Beatrix Lane, an adventurous explorer mouse--and when the tapestry is stolen they set out to find the treasure using the explorer's diary as a guide.

Using the clues found in Aurora Beatrix Lane's travel diary, the Thea Sisters continue their search for the seven lost treasures; and the object this time is the Ring of True Love, a journey that begins in Verona, Italy, with the story of Romeo and Juliet and takes them around the world.

"The Thea Sisters are just about to head off on their separate family vacations when they receive a call from Will Mystery. Once again, there is trouble in one of the imaginary kingdoms! A crack has been discovered in one of the maps in the Hall of Roses. The girls head to the Crystal Kingdom to help uncover the mystery. There, they find that a dragon has been wreaking havoc all over the land. He has been turning all of their precious gems into stone and leaving a path of destruction wherever he goes. The sisters figure out why and help break the spell"--Back cover.

When the Thea Sisters discover a mysterious old mirror hidden in a dusty attic at Whale Island College, they’re suddenly transported into a fantastical realm where nothing is quite as it seems. They’ve entered the Land of Erin, a magical world threatened by dark forces — and the mirror may be the only key to saving it. As they journey through enchanted forests, shimmering lakes, and hidden kingdoms, the Thea Sisters must solve ancient riddles, brave dangerous obstacles, and stay united to uncover the truth behind the mirror’s magic. Time is running out, and the fate of an entire world rests in their paws.

"The famous Chef Crouton is teaching a course at Mouseford Academy on healthy eating and the Thea Sisters are chosen to compete on a special episode of his TV show! What do you get when you mix five friends, a cooking contest, a visiting brother, a few misunderstandings, and a pinch of drama? The perfect friendship recipe, of course!" -- Back cover.

"While exploring a remote part of Whale Island for a class project, the Thea Sisters stumble on a group of researchers studying migrating butterflies. Eager to learn more about the beautiful creatures, the mice volunteer as assistants. But when a TV crew shows up unexpectedly, there's drama in the camp! the butterflies may be in danger, and it's up to the Thea Sisters to protect them. It's a colorful adventure they'll never forget!"--back cover.