First off, I love that these are dust rats and not dust bunnies. Sir Muffin watches over his human charge Emma every night while she sleeps. But at night when she dreams is when the dust rats come out to play. They play with Emma’s dreams and have daring adventures. They travel to the arctic, brave a dragon and explore space. But if Emma is left too long she starts to float away, and then it will take everyone to keep her grounded. This book was wonderful. The illustrations are bright and colorful, and how they blend one idea to another is fantastic.