<P> The Wizard of Oz does not resort to anywhere near as much trickery in the movie as the book . In the book he entertains each member of Dorothy's party on a different day, and takes a different form for each; appearing as a giant green head, a beautiful fairy, a great beast, and a levitating ball of fire . In the movie he takes only one of these forms--that of the giant green head . </P> <P> The nature of the Emerald City is changed in the film . In the book, the city is not actually all green, but everyone is forced to wear green tinted spectacles (ostensibly to protect their eyes from the glory and splendor of the luxurious city), thus making everything appear green . In the film, the city is actually all green . The architecture of the Emerald City in the movie uses a much more contemporary Art Deco style than Baum could have imagined . In the book, a giant green wall studded in glittering emeralds surrounds the entire city, whereas in the movie there is only a gate opening . </P> <P> The movie replaces the charmed Silver Shoes with pointed toes of the book with Ruby - Red Slippers . This was because full color motion pictures were still a relatively new technology in 1939, and MGM wanted to show off the visually dazzling process . Shiny red shoes were more impressive in a color motion picture compared to silver ones . Due to the popularity of the movie, the green witch and the Ruby Slippers are more well known to the general public and pop culture than their book counterparts, and are even considered iconic . </P> <P> In his revisionist Oz novels Wicked: The Life and Times of the Wicked Witch of the West, Son of a Witch, A Lion Among Men and Out of Oz, Gregory Maguire portrays a very different version of the Land of Oz . Maguire's Oz is not Baum's utopia, but a land troubled by political unrest and economic hardship . One political issue in Maguire's novels is the oppression of the Animals (Maguire distinguishes speaking Animals from non-speaking animals by the use of initial capital letters). There are many religious traditions in Maguire's Oz, including Lurlinism (which regards the Fairy Lurline as Oz's creator), Unionism, which worships the Unnamed God, and the pleasure faiths which had swept Oz during the time that the witches were at Shiz . An example of the pleasure faiths were tic - toc (where creatures were enchanted to tell secrets or the future and run by clockwork), and sorcery . </P>

Where did the name wizard of oz come from