* CameoProp: Baum died before MGM's version of ''Film/TheWizardOfOz'' was filmed, but, in a remarkable coincidence, Frank Morgan as Professor Marvel wore a secondhand coat that turned out to have belonged to the author. (It's true; {{Snopes}} [[http://www.snopes.com/movies/films/ozcoat.asp confirms it]].)
* CreatorBacklash: While he didn't exactly ''hate'' the [[Literature/TheWonderfulWizardOfOz book that made him famous]], he was disappointed that none of his other literary attempts were anywhere near as successful, forcing him to continue writing Oz sequels [[MoneyDearBoy for the money]]. He tried several times to end the series (for instance, by having Oz be permanently cut off from communication the outside world), but the public would have none of it.