Join Thea Stilton and the Thea Sisters on an adventure through Mouseford Academy!Anna Winmouse, the fabumouse editor-in-chief of Cosmouse magazine, is renting Cheddarton House, a cottage that overlooks Whale Island's Seashell Beach. She's trying to get away from the media for a while, but it hasn't been easy. Can the Thea Sisters help her keep her visit to Whale Island a secret?