I've read the book. And
I expected to like it,
since I had enjoyed
the books that Brown used
as background material.
But I found Brown's book
not only just dull,
but, ultimately, kind of
gutless since the end
doesn't really say
what was really going on,
just lets readers guess.
Huh. As a reader of mysteries, I found it fast moving and quite interesting. His plot was far more complex than most of the mysteries written, but flowed a lot better than did Angels and Demons.
As for his ending, I do think that served two possible purposes. First, while building what most here consider an anti-Christian theme, his protagonist saw that whatever documents were there might endanger the Church and did not want that. And second, let's face it, makes for a great sequel....