"Touch Blue" is a children's novel written by Cynthia Lord. The story follows a young girl named Tess who lives on an island off the coast of Maine. Tess's life changes when her family takes in a foster child named Aaron, and she hopes that this will bring good luck to her family. The book explores themes of family, friendship, and the challenges of adjusting to new situations. As Tess navigates her feelings about Aaron and her own fears, she learns valuable lessons about acceptance and love. The narrative is engaging and relatable for young readers.