The Treasure of the Sea by Thea Stilton is part of the ("Thea Stilton Special Edition" series, ) (Hardcover)

The Treasure of the Sea is a book from the Thea Stilton series, part of the Geronimo Stilton franchise. In this adventure, Thea Stilton, who is a special correspondent for The Rodent’s Gazette, leads the Thea Sisters—five young, talented, and brave mice—on an underwater quest.

In the story, the Thea Sisters travel to the Kingdom of the Coral to help their friend Will Mystery. The realm is in danger because an ancient treasure, a precious coral jewel, has been stolen. As the underwater kingdom starts to lose its vibrancy, the Thea Sisters must uncover the secret of the stolen treasure, face multiple challenges, and work together to save the kingdom and restore the magic of the sea.

The book is full of themes like friendship, teamwork, and problem-solving, and it is known for its vivid, imaginative illustrations. The adventures often include magical elements, fantastic settings, and intriguing mysteries, making it appealing for young readers who enjoy action and fantasy.

Is this what you were looking for, or did you need something more specific?