Thea Stilton and the Secret of the Old CastleBook - 2012
"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 find her! Along the way, the Thea Sisters encounter Celtic legends, cryptic messages, and hidden treasures on a trip that's full of surprises!" --P.  of cover.
Publisher: New York : Scholastic, 
Copyright Date: ©2012
Branch Call Number: STI
Characteristics: 159 pages : color illustrations, color map ; 20 cm
Alternative Title: Secret of the old castle