According to Wikipedia: "The Enchanted Island of Yew: Whereon Prince Marvel Encountered the High Ki of Twi and Other Surprising People is a children's fantasy novel written by L. Frank Baum, illustrated by Fanny Y. Cory, and published by the Bobbs-Merrill Company in 1903... The Island of Yew is set at some undisclosed place in the Earth's global ocean "in the middle of the sea." (Later commentators have sometimes placed it in Baum's "Nonestic Ocean" with the landmass that contains the Land of Oz and its associated countries; but there is no authority for this in the book itself.) Like Oz, it is divided into four countries associated with the four cardinal directions, plus a fifth central country that dominates the others. In the east of Yew lies the land of Dawna; in the west, "tinted rose and purple by the setting sun," is Auriel. In the south lies the kingdom of Plenta, "where fruits and flowers abounded;" and in the north is Heg, the most stereotypically feudal and medieval of the four. In the center, like the Emerald City in Oz, lies the fifth kingdom of Spor."