Over Sea, Under Stone tells the story of one of the skirmishes between good (Light) and evil (Dark) that culminates in the cosmic battle recorded in the last novel of the series, Silver on the Tree. All of the main characters in the novel fight on one of these two sides, although their allegiances are not always immediately clear. Some of the characters working for the Dark initially seem to be on the side of the Light. As they are drawn into the conflict Jane, Barney, and Simon elect to fight for the Light. Because they must decide which side to support and then must prove their commitment through action, the Drew children are the major characters in the book. They grow the most because of the choices they must make. Great-Uncle Merry, the most powerful representative of the forces of Light, and Mr...