The Hero’s Guide to Saving Your Kingdom Fox Animation and Chernin Entertainment have acquired the film rights to Christopher Healy's children’s book "The Hero’s Guide to Saving Your Kingdom". The story follows the four princes from the classic fairy tales who saved Cinderella, Snow White, Rapunzel and Sleeping Beauty. Having been exiled from their respective kingdoms, each gets a shot at redemption and glory when they uncover a plot that could destroy the kingdoms.