Clamber up branches and peek through leaves to discover the wonderful jobs trees do, from cleaning our air and keeping us cool to protecting our planet and providing homes for all kinds of wildlife.
Katie has been writing non-fiction children's books for almost half her life and loves questioning the world from a child's point of view. She's developed some of Usborne's bestselling series, including the See Inside books and the Lift-the-Flap Questions & Answers series.