Each Geronimo Stilton book is fast-paced, with lively full-color art and a unique format kids 7-10 will love. Holey cheese! My sister, Thea, was in danger. She had traveled to Easter Island in search of a mysterious treasure, but we hadn't heard from her for more than a week! There was no time to lose--my friends and I hopped on a plane to begin looking for her. What an exciting adventure!