After its groundbreaking success as a best seller novel, film adaptation of INFERNO is due to start in april this year with Hanks reprising his role as Harvard professor of religious iconology and symbology, Robert Langdon.

Dan Brown 's previous book  The Lost Symbol is yet to be made into a film due to some undisclosed reasons.

As for my opinion , the best pure sci-fi thriller written by this renowned american author is yet to be made into a film   The Deception Point  possibly because of the absense of  Prof   Robert Langdon as protagonist in it. I was mesmerized by this breath-taking techno-thriller after first time reading and waiting eagerly for it to be made into a film. What do you think?

Here is a youtube link to a fan made trailer of this unexisting movie: