Well, what a stroke of good luck. I just got finished reading that book while I was on vacation. I really liked it. Xantar's right. To the common folkster like myself, the theory he produces sounds like it could work but we all know that time travel won't be discovered until 2008--uh I mean well...
*puts on shades*
*flash of light* You know nothing of time travel. You spend your life on the internet posting in many forums. That is all.
A question I'd like to bring up is why don't they go back and save Gomez and that other guy who got arrowed up? A comment I'd like to make is if I were Chris, after returning and taking care of Doniger, I would have gone back but this time with some modern weopons, and I would have found all those people who were beating him, killing him, etc. and whooped their a$$. But I guess going back would really mess things up because then they see themselves and then they would help those people and then all that original stuff would have never happened.