Well I have to say that Dan Brown will never be confused with the great authors of our time. The only reason I like any of his books is because of the subject matter in The Da Vinci Code, and also the subject matter in Angels and Demons.
If you take and read all of his books you notice they all follow exactly the same plot outline only with different nuggets of info thrown in to alter the title. Its almost as if he sat down and followed the same blueprint for each book. Only real difference is the subject matter, and in the case of Angels and Demons, and The Da Vinci Code the subject matter isnt all that different.