And someday you can learn to write coherent English sentences, but I'm not holding out much hope.
In fact, I haven't read TDVC, but I did read Holy Blood, Holy Grail, the book that gave Brown his central mythology, which was presented entirely as fact.
The problem with TDVC is that at least half the people who read it seem to think the Holy Blood mythology is factual, or at least has some basis in fact. That's the whole problem, and as far as I've seen Brown isn't quick to dissaude people of that belief.
As I understand it, the original hoax was perpetrated by a guy named La Plante. He forged documents and -- appropriately enough -- planted them in certain European archives where his partners in the hoax pretended to find them. Even though it is now known that the documents aren't real, many people continue to think there's some basis for the stories.
Other people seem to have found Da Vinci Code a good read. I thought it was very amateurishly written and boring.