Like many authors ranging from Victor Hugo and Shakespeare to James Redfield and James Ferrell, Dan Brown understands the power of a good fictional story. In reading his books, you realize that like the mentioned authors, he teaches ideas and concepts through a made up story instead of a true one. The advantages to this are twofold: 1. You don’t have to write a bibliography (or otherwise back up or defend what you say), and 2. More people will read it if the story’s engaging, regardless of the ideas being taught.
I remember laying in bed reading the DaVinci Code several years ago excited by the story, intrigued by the symbols and codes, and impressed by what seemed to be some restored-gospel truths about Christ and his possible marriage to Mary Magdalene. Originally I rejected the idea of the marriage, but after talking to some of my mentors of the time, decided that “we don’t know”