Reading level: grade 4.

Join Thea Stilton and the Thea Sisters on an adventure packed with mystery and friendship! While Violet is taking an art class in the Netherlands, her friend's father suddenly disappears! The missing mouse is a renowned botanist -- and his disappearance is linked to the mysterious black tulip. The Thea Sisters are eager to help find him. It's an adventure through the flowers gardens and canals of Holland!

Join Thea Stilton and the Thea Sisters on an adventure packed with mystery and friendship! While on vacation in Greece, the Thea Sisters make friends with a company of actors. They are rehearsing for a show that's about to open -- and Colette ends up standing in for an actress who falls ill! Suddenly, right before the performance, the lead actor goes missing. Can the mouselets find him in time for the show to go on?

Join Thea Stilton and the Thea Sisters on an adventure packed with mystery and friendship! The Thea Sisters are heading to Malaysia. Their friends, Latifah and Ramlee, are writing a travel guide and have asked the sisters to help them research. They are stopping at all the best sites, eating all the best foods, and seeing the most amazing animals, especially in the rainforest. While they are exploring they learn about a plan to cut down the trees in the forest and Ramlee and their guide go missing! Can the sisters track down their friend and save the forest?

Thea Stilton is out of this world!A professor at Mouseford Academy is organizing a trip to outer space, and the Thea Sisters are invited. 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? Find out in an adventure that's out of this world!

"The Thea Sisters travel to New York to cheer for Nicky as she runs the Big Apple Marathon. While there, they visit Pamela's family and have a delicious dinner at the family's pizzeria. But when someone threatens to burn the restaurant down, can the Thea Sisters catch the troublemaker and solve the mystery?"--P. [4] of cover.

" 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?" --