The Thea sisters have received an urgent message from their friend Will Mystery saying that the magical land of the clouds is in danger and the mouselets must find out why the clouds are disappearing.
- ISBN13 9780545835367
- Publish Date 29 September 2015
- Publish Status Out of Stock
- Out of Print 3 April 2023
- Publish Country US
- Imprint Scholastic US
- Format Hardcover
- Pages 320
- Language English