Answer the question at the end by quoting:

Lyman Frank Baum (May 15, 1856 - May 6, 1919), better known as L. Frank Baum, was an American author chiefly famous for his children's books, particularly The Wonderful Wizard of Oz and its sequels. He wrote a total of 14 novels in the Oz series, plus 41 other novels, 83 short stories, over 200 poems, and at least 42 scripts. He made numerous attempts to bring his works to the stage and the nascent medium of film; the 1939 adaptation of the first Oz book would become a landmark of 20th century cinema. His works anticipated such century-later commonplaces as television, augmented reality, laptop computers (The Master Key), wireless telephones (Tik-Tok of Oz), women in high-risk and action-heavy occupations (Mary Louise in the Country), police corruption and false evidence (Phoebe Daring), and the ubiquity of advertising on clothing (Aunt Jane's Nieces at Work).
Two years after Wizard's publication, Baum and Denslow teamed up with composer Paul Tietjens and director Julian Mitchell to produce a musical stage version of the book under Fred R. Hamlin. Baum and Tietjens had worked on a musical of The Wonderful Wizard of Oz in 1901 and based closely upon the book, but it was rejected. This stage version opened in Chicago in 1902 (the first to use the shortened title "The Wizard of Oz"), then ran on Broadway for 293 stage nights from January to October 1903. It returned to Broadway in 1904, where it played from March to May and again from November to December. It successfully toured the United States with much of the same cast, as was done in those days, until 1911, and then became available for amateur use. The stage version starred Anna Laughlin as Dorothy Gale, alongside David C. Montgomery and Fred Stone as the Tin Woodman and Scarecrow respectively, which shot the pair to instant fame. The stage version differed quite a bit from the book, and was aimed primarily at adults. Toto was replaced with Imogene the Cow, and Tryxie Tryfle (a waitress) and Pastoria (a streetcar operator) were added as fellow cyclone victims. The Wicked Witch of the West was eliminated entirely in the script, and the plot became about how the four friends were allied with the usurping Wizard and were hunted as traitors to Pastoria II, the rightful King of Oz. It is unclear how much control or influence Baum had on the script; it appears that many of the changes were written by Baum against his wishes due to contractual requirements with Hamlin. Jokes in the script, mostly written by Glen MacDonough, called for explicit references to President Theodore Roosevelt, Senator Mark Hanna, Rev. Andrew Danquer, and oil magnate John D. Rockefeller. Although use of the script was rather free-form, the line about Hanna was ordered dropped as soon as Hamlin got word of his death in 1904. Beginning with the success of the stage version, most subsequent versions of the story, including newer editions of the novel, have been titled "The Wizard of Oz", rather than using the full, original title. In more recent years, restoring the full title has become increasingly common, particularly to distinguish the novel from the Hollywood film. Baum wrote a new Oz book, The Marvelous Land of Oz, with a view to making it into a stage production, which was titled The Woggle-Bug, but Montgomery and Stone balked at appearing when the original was still running. The Scarecrow and Tin Woodman were then omitted from this adaptation, which was seen as a self-rip-off by critics and proved to be a major flop before it could reach Broadway. He also worked for years on a musical version of Ozma of Oz, which eventually became The Tik-Tok Man Of Oz. This did fairly well in Los Angeles, but not well enough to convince producer Oliver Morosco to mount a production in New York. He also began a stage version of The Patchwork Girl of Oz, but this was ultimately realized as a film.

did he write anything else?

He also worked for years on a musical version of Ozma of Oz, which eventually became The Tik-Tok Man Of Oz.

IN: Josh Groban was born in Los Angeles, California, to Lindy (nee Johnston), a school teacher, and Jack Groban, a businessman. Josh's younger brother, Chris, was born on Josh's fourth birthday. Josh's father is a descendant of Jewish immigrants from Poland and Ukraine, and converted from Judaism to Christianity upon marrying Josh's mother. Josh's mother's ancestry includes English, German, and Norwegian.

On February 24, 2002, Groban performed "The Prayer" with Charlotte Church at the closing ceremonies of the Winter Olympics in Salt Lake City, and by November, he had his own PBS special, "Josh Groban In Concert" (2002). In December 2002, he performed "To Where You Are" and sang "The Prayer" in a duet with Sissel Kyrkjebo at the Nobel Peace Prize Concert in Oslo, Norway. He joined The Corrs, Ronan Keating, Sting, Lionel Richie, and others for a Christmas performance at the Vatican in Rome, Italy. In 2003, Groban performed at the David Foster concert for World Children's Day, singing "The Prayer" with Celine Dion and the finale song, "Aren't They All Our Children?" with artists including Yolanda Adams, Nick Carter, Enrique Iglesias, and Celine Dion. Groban's second album Closer, produced and written by Foster, was released on November 11, 2003. Groban said that he believed that this second album was a better reflection of him, and that his audience would be able to get a better idea of his personality from listening to it. Two months after Closer was released, it rose on the Billboard charts from number 11 to number one. Groban's cover of "You Raise Me Up" became his third most popular song on the adult contemporary charts as of March 2004. Later that year, he also performed the song "Remember" (with Tanja Tzarovska) on the Troy soundtrack, "Believe" on the soundtrack to the 2004 animated film The Polar Express and a cover of Linkin Park's "My December". In the summer of 2004, Groban returned to Interlochen, performing and discussing his earlier experiences with local residents and campers. On November 30, 2004, his second live DVD, Live At The Greek, was released; it was also shown as a Great Performances special on PBS. Also in 2004, Groban performed "Remember When It Rained," backed by a full orchestra, at the American Music Awards, where he was nominated for Favorite Male Artist in the pop category; he was also nominated for a People's Choice Award in that year. His recording of "Believe" secured a 2005 Academy Award nomination for the song's two writers, Glen Ballard and Alan Silvestri, and earned them a Grammy in the category Best Song Written for a Motion Picture, Television or Other Visual Media at the ceremony held in February 2006.

What other performances are important?

OUT:
by November, he had his own PBS special, "Josh Groban In Concert" (2002).