The Unknown Witches of Oz The Unknown Witches of Oz The Unknown Witches of Oz: Locasta and the Three Adepts is a 2000 novel written by Dave Hardenbrook, with illustrations by Kerry Rouleau. As its title indicates, the book is an entry in the long-running series of books about the Land of Oz, written by L. Frank Baum and his successors. The publication of "The Unknown Witches of Oz" was timed to coincide with the centennial of the original Oz book, "The Wonderful Wizard of Oz" (as was also true of Gina Wickwar's "The Hidden Prince of Oz" and Edward Einhorns's "Paradox in Oz"). Hardenbrook's
The Wonderful Wizard of Oz University Press of Kansas's "Kansas Centennial Edition", illustrated by Michael McCurdy with black-and-white illustrations, and Robert Sabuda's pop-up book. Baum wrote "The Wonderful Wizard of Oz" without any thought of a sequel. After reading the novel, thousands of children wrote letters to him, requesting that he craft another story about Oz. In 1904, he wrote and published the first sequel, "The Marvelous Land of Oz", explaining that he grudgingly wrote the sequel to address the popular demand. Baum also wrote sequels in 1907, 1908, and 1909. In his 1911 "The Emerald City of Oz", he wrote that he could not