Much better than Da Vinci code and not as good as Angels demons. Apply the same formula from the first two books in DC. 
 This time however ventures into spirituality but doesn't expand on the theme. He maintains his comfort zone, picking and choosing argument he is comfortable with where there is a specific winning side and a specific losing side. 
 The pacing of the plot is good which keeps turning the pages. Other than that, its quite ordinary for a tried and tested pattern.