Dorothy and the Wizard in Oz by L. Frank Baum - "Royal Historian of Oz." Dorothy and the Wizard in Oz is the fourth book set in the Land of Oz written by L. Frank Baum. It was published on June 18, 1908 and reunites Dorothy with the humbug Wizard from The Wonderful Wizard of Oz (1900). It's no use; no use at all. The children won't let me stop telling tales of the Land of Oz. I know lots of other stories, and I hope to tell them, some time or another; but just now my loving tyrants won't allow me. They cry: "Oz.