Mastering the Universe: He-Man and the Rise and Fall of a Billion-Dollar Idea is a 2005 book by Roger Sweet and David Wecker that recounts Sweet's work behind the scenes of the corporate culture of the 1980s American toy industry.
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In 2005, he co-authored Mastering the Universe: He-Man and the Rise & Fall of a Billion Dollar Idea (Emmis Books), with his uncle, Roger Sweet, who created the concept for the 1980s action figure, He-Man, for Mattel.