Discover how Jack Frost keeps the hearts of children happy in the third picture book in Academy Award winner William Joyce's New York Times bestselling and "dazzlingly inventive" ( Publishers Weekly ) The Guardians of Childhood series. Before Jack Frost was Jack Frost, he was Nightlight, the most trusted and valiant companion of Mim, the Man in the Moon. But when Pitch destroys Mim's world, he nearly destroys Nightlight too, sending him plunging to...