Thea Stilton and the Riddle of the Ruins

Thea Stilton and the Riddle of the Ruins is book #28 in the Thea Stilton series, rated at a 4.8 reading level for Middle Grades 4-8. In this adventure, Thea Stilton and her sisters travel to Hierapolis, Turkey, where they are assisting at an archaeological excavation. When their friend disappears and Professor Brenninger discovers ancient figurines, the Thea Sisters must investigate whether the discovery is genuine or a scam. They race against time to solve the mystery of the ruins and find their missing friend.