Vern G. Swanson has written a Da Vinci Code of his own, arguing in Dynasty of the Holy Grail: Mormonism's Sacred Bloodline that LDS founder Joseph Smith was a descendant of Jesus. And yet, he doesn't sound very confident in his thesis.
Swanson admits he can't prove the LDS Church's first president was descended from Christ. He also concedes that if Jesus indeed fathered children, millions of his descendants could be alive today. Swanson says he came to his conclusion by weaving together circumstantial threads from history and hopes to correct errors in a future edition.
"I'm inching towards the truth. I haven't found the truth. I have no hard evidence," says the art historian and scholar. "I wish I could say I had some secret evidence that no one else has." [Link]