Dan Brown is sticking to his recipe for success: The chapters are relatively short, the storylines are well interwoven (so that actually always somewhere something exciting happens) and skilful omissions seduces the reader "just this section" to read further. As a movie (with extra length) of material would work well sure as a book it is unfortunately repeatedly even a leg. (See a ride by subway complacent? The resolution I have come. This could have been shorter.) Add to that some other length: - It takes 200 page to Langdon comes from the Capitol out; (2/5 of the book!) - Dan Brown's characters hear definitely like to talk even about their areas of expertise; - The actual epilogue is about 40 pages long and in it is at least half the time trying to make NEOTIC and its implications once more palpable (can science as thoughts change and influence things - in the direction of there really research what you from the theme keeps itself is a matter of taste); - At the point that was probably as the "most dramatic" of the whole book was scheduled, the author has VERY far leaned out the window. The situation is of course dissolved at the end of the author, but for a brief moment I really had the fear that the book would drift into the paranormal. - And a few other things, for example, that Peter Solomon (although one should cheer his survival) remains insane as pale figure.
What is supposed to create tension (who is doing the right thing and who believes to do the right thing?) Inflates the book - in my eyes - just unnecessarily. And really exciting is really only between page ~ 300 and ~ 450, which is but a little late.
And yet, the book lets loose weglesen. The short section is allowed to be readily swayed yet to read a few more pages. All the negative points come to mind really only when you put the book after the last page of the hand and determines "that was not really so amazing."