I wish I could find the article that dispells the "poverty=terror" myth. The article I'm referring to researched terrorism over the last couple of decades and the ONE thing in common with regions that breed terror was not economic but political. The research found that the root causes of terrorism are non-democratic dictatorial regimes.
The book you're looking for is "The Koran."
Seriously, there's a good book called "The Close Circle: An Interpretation Of The Arabs" by David Pryce-Jones, which though not about terrorism per se, is a revealing history of the stange Arab mindset which causes it to be in conflict at all times.
Basically, there's no allegiance to anything but to the tribe and to Islam, and Islam is not (and rarely has been) the true unifying force that it was supposed to be.
If they weren't fighting us, they'd be fighting each other, just as they've done countless times even in the last century.
There was an article/op-ed piece by Fukuyama in the WSJ a few years back that bashed the idea that radical Islam is the result of poverty. Very good article but I can't seem to find it.