I've read 3 of them ( exept Deception Point, i've bought it but haven't read it)
Among them.........Angels and Demons and Da Vinci Code are very similar.......... the same person........... same style(breaking codes/interpreting history(symbols))........... You would find it rather boring if you read both............
Digital Fortress is a great story........... a twist and turn strategy..........leading us to a false direction........... and tell us the ending surprisely........... yet...........difference between Digital Fortress and Da Vinci Code is that Digital Fortress doesn't require you to think..........
i just finished digital fortress and read the two novels about robert langdon~
i found that these three novels are kinda similar~ the two main characters are always running around....
i am looking forward to have some time to buy deception point....