The Emerald City of Oz is the sixth of L. Frank Baum’s fourteen Land of Oz books. Originally published in 1910, it is the story of Dorothy and her Uncle Henry and Aunt Em coming to live in Oz permanently. While they tour through the Quadling Country, the Nome King assembles allies for an invasion of Oz.Baum had intended to cease writing Oz stories with this book, but financial pressures prompted him to write and publish The Patchwork Girl of Oz, with seven other Oz books to follow.