I had bought Mom Dan Brown's Digital Fortress for Hanukkah and she recently sent me back a copy. I have to admit I couldn't put it down. Its a really quick read (helped by the fact that most chapters are only a couple of pages so its way too easy to tell yourself you'll just read one more... and then another...) However, I felt that the codes it was based on were too obvious and given away to the reader way before the characters finally figured them out, and the premise isn't as interesting as his DaVinci Code or Angels and Demons. It'd be a great airplane read though -- you'd be across the country in no time.