In "Thea Stilton and the Secret of the Old Castle," the Thea Sisters embark on an exciting adventure in the mysterious land of the Old Castle. When they receive a letter from a friend in distress, the mouselets travel to uncover the secrets hidden within the castle walls. With a mix of friendship, teamwork, and clever problem-solving, they encounter riddles, explore ancient rooms, and face challenges that put their skills to the test. As they dig deeper, they unravel a captivating mystery that reveals the castle's past and helps their friend in need, highlighting the power of courage and collaboration. [Generated by language model - please report any problems].

This book features in the following series: Geronimo Stilton, Geronimo Stilton Thea Stilton .

This book has been graded for interest at 7-9 years.

There are 176 pages in this book. This book was published in 2012 by Turtleback Books .

Thea Stilton is a special correspondent for The Rodent's Gazette, Mouse Island's most famouse newspaper. A graduate of Mouseford Academy, Ms. Stilton loves traveling and adventures. Find out more at www. scholastic. com/geronimostilton.