In a quiet town library, Mara Venn finds a living map named Mappa who is lost, frightened of being used, and brave enough to ask for help. With her thoughtful friend Juno Pike and the gentle guide Tibs, Mara enters the magical Folded World where paths are made from promises. When a selfish collector named Dreg tries to hoard those paths, the children learn that curiosity is a kind of courage and that shared power keeps a world together. Warm, lyrical, and safe for young readers, this standalone fantasy celebrates honesty, cooperation, and the joy of fixing mistakes.