I've read 4 of his books- not my option I got them bought for me.
Digital Fortress- Not too bad. Alot of it centres around encryption/decryption so interesting from that point of view. To be honest I'd rather read an actual book on the subject as the story is lame.
Deception Point- Bollocks. Very poor novel indeed from every standpoint. From the opening paragraph you see he is writing for hollywood with a view to emulating Tom Clancy's Harrison Ford character.
Angles and Demons- I actually enjoyed this to a point. Good ideas but crap structure to the plot. Predictible until it goes way over the top. The hero of the story is almost dead, in hospital and then disacharging himself in an instance to go through a similar routine again. Written on a big silver plasma page.
Da Vinci Code- Rip-off, not ever a good story, based on untruth and just all round unenjoyable. If the guy has any sense he'll knock out his next novel quickly to make as much money before being found out. At some point the people who have been told and believe, by being told, his books are good will be told the opposite then not buy them.
"No doubt I shall go on writing, stumbling across tundras of unmeaning, planting words like bloody flags in my wake."- Trocchi