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  ====''A Game of Thrones Guide''====
  In November 2012, Random House published ''George R. R. Martin's A World of Ice and Fire – A Game of Thrones Guide'', an iOS application that provides the biographies of 540 characters, descriptions of 380 places, and interactive maps. The app's "anti-spoiler functionality" hides information not yet revealed at the point up to which the user has read the novels.