Dan Brown is an average example of that rather common modern phenomenon - the writer of mildly engaging and easy to read books which are superficially interesting, but completely forgettable.A John Grisham?
Everything computer or crypto related in The Da Vinci Code broke the suspension of my disbelief, removing the springs and draining the shock absorbers.Ditto Digital Fortress. He's writes some horrible, horrible clumsy sentences (http://www.telegraph.co.uk/culture/books/booknews/6194031/The-Lost-Symbol-and-The-Da-Vinci-Code-author-Dan-Browns-20-worst-sentences.html) too.
Two Lumps?
Also, if you're going to make a puzzle, make it a good one, please? I got bored after thinking of three ways to open a cryptex.
I've only read one book by him (Deception Point), and that was quite a while ago. I don't know how much of this (http://tvtropes.org/pmwiki/pmwiki.php/Main/DanBrowned) happens in his other books.I loved Deception Point! That was a really good read for me.
I enjoy his books.I've only read Runaway Jury and Skipping Christmas and rather liked both of them.