Maria's Child by Bill Hearn

When Peter Jacobson hears a wild tale about biotech tycoon Harold Anthony, the Shroud of Turin, and Maria Anthony's baby; he's certain it's a bad joke. After all, Peter's friendship with Anthony's Latina daughter-in-law is no secret, and the storyteller is a notorious prankster who's just downed his seventh gin and tonic. But as years pass and Maria's son grows into a young man of eerie brilliance and kindness, Peter begins to wonder: Who is Maria's Child? Speculative fiction in the tradition of The Handmaid's Tale and George Orwell, Maria's Child turns the religious thriller genre in new and surprising directions.