These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
YMMV: The Da Vinci Code
Ho Yay: Silas and Aringarosa. Fache and Collet. The first seems to go both ways. The second is more of a case of Collet sorta worshiping Fache and Fache, at first, thinking him not-so-great. The book and film go about it differently, but at the end of each, Fache's opinion of Collet has somewhat improved.
What Cliffhanger: The book had a One-Paragraph Chapter in which Robert Langdon and his date see a thing inside a box. Whatever the grail was, it wasn't that thing. (The thing turned out to be a cryptex, i.e., a tube that had a puzzle to be solved for it to open) In fact, done frequently in anything written by Dan Brown. It's pretty much the end of every chapter.