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Referenced as Joseph Campbell being 'a great writer on mythology and the idea of universal hero' who George Lucas claimed inspired Star Wars. No specific title mentioned but this is Campbell's most famous work on the hero's journey.

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Mentioned as the book that 'inspired George Lucas, who was the guy who came up with the idea of Indiana Jones and for the Star Wars.'

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Mentioned as Joseph Campbell's last volume of his 'four-volume history of mythology,' in which 'Eschenbach's Parsifal was kind of central to that.'