The Wizard of Oz (1902 musical)
The Wizard of Oz was a 1902 musical extravaganza based on "The Wonderful Wizard of Oz" by L. Frank Baum, which was originally published in 1900. Much of the original music was by Paul Tietjens and has been mostly forgotten, although it was still well-remembered and in discussion at MGM in 1939 when the classic film version of the story was made. Although Baum is the credited bookwriter, Glen MacDonough was hired on as jokewriter after Baum had finished the script.
The Ozmapolitan of Oz
The word "Ozmopolitan" was first used in 1904, in promotional material created by Baum's publisher Reilly & Britton. The idea was that the Wizard of Oz started an Oz newspaper so titled (a conceit that Martin adopts for his novel). Reilly & Britton issued press releases in this Oz-newspaper form in 1904 and 1905, publicizing Baum's "The Marvelous Land of Oz" and related projects. It is possible though not certain that Baum himself wrote some of these early "Ozmapolitan" press releases. The publisher (under its later name Reilly & Lee) issued more "Ozmapolitan" press releases in the 1920s, to publicize the novels of Ruth Plumly Thompson, and in the 1960s for other products (including "Merry Go Round in Oz", with illustrations by Dick Martin). Three decades later, Hungry Tiger Press used the same publicity technique for issues of its "Oz-story Magazine".