3 2 books of Dan Brown's (I don't know why Angels and Demons didn't leave any significant traces in my brains) before this, Digital Fortress was nothing new. I couldn't help but to guess for the villain character in this book from the beginning (and I got it right, ok!).
There's a lot of twists in this book (and the previous 3) that I almost changed my stand towards the end of the book. To me, it was not a boring book although worm is nothing new today.