@Monk: Digital Fortress wasn't about a guy. Deception Point and Digital Fortress both were amusing reads, though. It's a bit sad that Brown repeats the same trick over and over again - you can pretty much guess the entire story's outline in every book by page 20.
Besides that, the only link between Angels & Demons and the Da Vinci Code is the main person and a quick reference to Victoria. Besides that, basically nothing, so they won't need to change anything besides dumping the Da Vinci girl. But since nothing happened there, no problem there either.
The trailer looks great, by the way, so I'm definitely seeing it on the day it releases here.

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