In L. Frank Baum's series of fourteen books (and several by other authors after he died) a squarish country bounded on most sides by uncrossable desert. Divided into four major areas: the land of the Munchkins, the land of the Gillikins, the land of the Winkies, and the land of the Quadlings, with the capital, the Emerald City in the center. Ruled by Ozma after the end of the second book.