The Thea Sisters travel through Mount Everest to enlist the help of the magical creatures they encounter on their journey to the Cloud Castle, where they are investigating why the clouds are disappearing from the Land of Clouds.
General Note: LSC 18.99"Based on an original idea by Elisabetta Dami"--Title page verso.Translation of: Il segreto delle fate delle nuvole.Geronimo Stilton and Thea Stilton are fictitious characters.At head of title: Geronimo Stilton.