True Jaguar

From Library Journal:

As Lana's Comet streaks through the sky on a collision course with Earth, U.S. government worker Jesus O'Hara Martinez enters the Mayan underworld to do battle with the Lords of Death in a reenactment of an ancient legend, the outcome of which could save or destroy the world. Despite its weak premise, Norwood's retelling of a classic Central American legend features strong characters and a richly detailed setting.