Dying to Win: The Strategic Logic of Suicide Terrorism by Robert Pape (It's one of the most important books on "Ron Paul's reading list")
Seriously, it goes into detail about the whole suicide terrorism stuff, a real "paradigm" changer.
I'd also suggest watching the excellent series of videos (BBC documentary) called "The Power of Nightmares" -- you can watch it on YouTube...
Part 1: http://www.youtube.com/watch?v=6O18HhmMamI
Part 2: http://www.youtube.com/watch?v=G8RLOvVabpk
Part 3: http://www.youtube.com/watch?v=S_C0wrqJ8BQ
etc. (The rest of the sections are all on youtube, just search on "The Power of Nightmares" or go the the SageProphet channel)