Although the film doesn't come out until May 19, thedavincichallenge.com went online Thursday, the New York Times reported.
The site features essays written by "Code" critics such as Gordon Robertson, the son of TV evangelist Pat Robertson and co-host of "The 700 Club."
About 45 Christian writers and leaders are being given the chance to argue the book's theological and historical representations.
"We believe this is unique and perhaps can set a tone for others," Sony spokesman Jim Kennedy told the Times. "We've all seen how some movies can evoke great consternation in society in the past, and I think many people want to move towards a more educational and uplifting dialogue."