Synopsis

Thea Stilton and the Secret of the Old Castle follows Thea and the five intrepid Thea Sisters as they uncover a mysterious legend surrounding an ancient castle. When rumors of a hidden secret resurface, the friends set out to investigate, navigating puzzling clues, unexpected dangers, and thrilling discoveries along the way. Blending suspense, teamwork, and courage, the story delivers an engaging mystery filled with action, friendship, and clever problem-solving, all brought to life with colorful illustrations and playful design elements.

About the Author

Thea Stilton is the adventurous sister of Geronimo Stilton and the central figure of the Thea Stilton series. Created by an Italian publishing team, the series features strong, resourceful female characters and fast-paced mysteries set around the world. Known for its empowering themes, interactive visuals, and accessible storytelling, the Thea Stilton series encourages curiosity, confidence, and teamwork among young readers.