Reflections on the gods, the religion and the politics of the Nahuatl world. On the search for the biography of Ce Acatl Topiltzin Quetzalcóatl, on the perplexity that has provoked to the historians realizing that its mystery belonged to others, and that it was laid down by a myth. Lopez Austin presents an analysis of the diverse inquiries that have been made about Quetzalcoatl throughout history.