<onlyinclude> The
Oz books form a
book series that begins with
The Wonderful Wizard of Oz (1900) and relate the fictional history of the
Land of Oz. Oz was created by author
L. Frank Baum, who went on to write fourteen full-length Oz books. All of the books are in the
public domain in the United States. Even while he was alive, Baum was styled as "the Royal Historian of Oz" to emphasize the concept that Oz is an actual place. The illusion created was that characters such as
Dorothy and
Princess Ozma related their adventures in Oz to Baum themselves, by means of
wireless telegraph.