Lyman Frank Baum (May 15, 1856 – May 6, 1919) was an American author of children's books, best known for writing The Wonderful Wizard of Oz, published in 1900. One of the most successful novels in American literature, The Wonderful Wizard of Oz sold out instantly, became a cutlrual sensation, and sold over three million copies before entering the public domain in 1956. Baum wrote thirteen novel sequels, nine other fantasy novels, and a host of other works, including 83 short stories, over 200 poems, and 55 novels. He made numerous attempts to bring his works to the stage and screen. Baum's writings remarkably anticipated innovations including television, augmented reality, laptop computers (The Master Key), wireless telephones (Tik-Tok of Oz), women in high-risk, action-heavy occupations (Mary Louise in the Country), and the ubiquity of advertising on clothing (Aunt Jane's Nieces at Work).