True jaguar

J. Martin O'Hara leads an ordinary life as a technical writer—until he meets the mysterious Indian who claims O'Hara is the descendant of the Mayan god, Great True Jaguar. Only O'Hara—True Jaguar—can prevent Lana's Comet from destroying Earth—by journeying to the Underworld and challenging the mighty Mayan to a battle unlike any Earth has ever known.