If you're keen on tales with companionship at their core, bustling with thrilling adventures steeped in legend, "Thea Stilton and the Secret of the Old Castle" could be a delightful journey for you. The Thea Sisters embody the spirit of teamwork as they unravel cryptic messages and search for hidden treasures, providing young readers with a vivid getaway into the charms of Scotland and the warmth of enduring friendships.

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Geronimo's sister Thea Stilton narrates this action-packed adventure! 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 help find her! Along the way, the Thea Sisters encounter Celtic legends, cryptic messages, and hidden treasures on a trip that's full of surprises!

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