Ozma and Dorothy go to settle a war between the Flatheads and the Skeezers, and are trapped under a lake in a glass-domed city whose ruler has hidden the means of raising it. Baum died before the book was published and left it as his farewell to Oz. It is the most inventive of the later volumes, and the shorter tales printed with it show him working in a smaller key. Its 133 original illustrations have been carefully restored and coloured for this edition.