The Emerald City of Oz

by Lyman Frank Baum

Book 6 of the Oz series. Illustrated by John. R. Neill. It was also adapted into a Canadian animated film in 1987. It is the story of Dorothy Gale and her Uncle Henry and Aunt Em coming to live in Oz permanently. But while they are toured through the Quadling Country, the Nome King is assembling allies for an invasion of Oz.