The Thea sisters are off to Madagascar for Adventure Camp. While on the nature preserve, they discover that endangered animals are under threat.

"Join Thea Stilton and the Thea Sisters on an adventure packed with mystery and friendship! The Thea Sisters visit Mexico!"--

While on vacation in the Bahamas, the Thea sisters stumble across an old pirate map and endeavor to find the treasure, unaware that someone else is also seeking the prize.

In this 36th volume in the series, "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?"--

" While on vacation in Greece, the Thea Sisters make friends with a company of actors who are rehearsing for a play that's about to open. When an actress sprains her ankle, Colette ends up standing in for her! But suddenly, right before the performance, the lead actor goes missing. Can the mouselets find him in time for the show to go on?" --

"The Thea Sisters are heading to Rome! They were chosen to be part of an international archaeology competition. The mouselets have to follow clues through Rome to solve puzzles and win the golden cup. But as they explore the beautiful city, the sisters get the sense they are being followed, and worse, someone is going through a lot of trouble to slow them down. can teh mouselets figure out who is trying to sabotage their chance at the prize before...

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.

The Thea sisters are off to Japan on a cultural exchange program. While they're busy exploring Kyoto and admiring the beautiful cherry blossoms, a valuable item is stolen from their friend Kumi's family. Will the five mice be able to catch the thief?

The mouselings are headed on a fabumouse mission-- to the moon! After much preparation, the mice blast off. But when they arrive at their lunar vacation spot, things start to go wrong, including spaceship wrecks and rebellious robots. Can the Thea Sisters save the day?

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 Eternal Love, a journey that begins in Verona, Italy, with the story of Romeo and Juliet and takes them around the world.