Thea Stilton and the Secret of the Old Castle

By : Thea Stilton


Chapter Books

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!


  • Genre: Chapter book
  • Lexile Measure: 700L
  • ISBN: 9780545341073
  • Format: Paperback
  • Rights: WORLD