Lyman Frank Baum's first ambition was to be a newspaper reporter. He wrote for adults and children under several pen names, but he is best known for the 14 books that compose his Oz series--the best of which are often considered to be THE WIZARD OF OZ, THE MARVELOUS LAND OF OZ, OZMA OF OZ and GLINDA OF OZ. Baum wrote a musical version of THE WIZARD OF OZ in 1902. His original book was turned into a movie in 1939. A second musical version was created in the 1970s.