They'll make Angels and Demons when the DVC movie cleans up, which I have absolutely no doubt it will.
The fact that I have been unable to pick up a single Dan Brown book that does not have, as its prologue, a scene in which someone is being killed or dying for a secret, does not bode well for Mr. Brown's abilities as a writer. Even trash writers know better than to show so clearly that their work is just the "same ol' same ol'" every time. He is also distressingly fond of "FACT" pages, which are just tiresome, not to mention frequently jarringly inaccurate and poorly researched, as in the Angels and Demons (I think) one in which he says that scientists have actually created anti-matter "recently" and then summarises anti-matter as being the same as matter only with the opposite electrical charge, which is a gross oversimplification which would have been better incorporated somehow into the text or just left out. (To be fair, even a bona fide science fiction author, Stephen Baxter, could not forbear from including one of these bogus "FACT" pages, something I just found highly irritating!
Disclaimer: My handle has absolutely nothing to do with any character named "Silas" who may or may not appear in a Dan Brown novel.