I didn't like this as much as I thought I would. I've had this life-long obsession with books and the basic premise sounded right up my street. What didn't work for me is that the characters stayed as flat at comic book characters. Like the female 'love-interest', Kat. Wearing the same tee-shirt all the time and rarely been seen off the internet isn't character development. It's a comic book character's visual signature.
It didn't help that the plot is basically a puzzle without believable consequences (despite the hi-falutin' promise of immortality, or whatever). I honestly thought this would have worked better as a comic book, with lots of amazing visual stuff. In fact, I think it would have worked brilliantly that way. But as a novel, it lost me a bit.