The Marvelous Land of Oz - L. Frank Baum

The Marvelous Land of Oz is the second of the Oz books. It follows the adventures of the Scarecrow, the Tin Woodman and Tip. The Emerald City has been taken over by the Army of Revolt, and our adventurous friends need the help of Glinda the Good to return it to its rightful ruler.
(Summary by Paul Harvey)