I've shared this book with a few friends, including Dr. Atta J. Turk. Yesterday, the author was awarded The Pulitzer Prize for General Non-Fiction.
If you haven't had enough of 9/11 (and even if you have) take a look. The chapter on bin Laden second-in-command Ayman al-Zawahiri is worth the entire purchase price. I hope that serious, reality-based people whose job it is to deal with this problem (as opposed to yapping pointless and harmful slogans about it) read it, because it is a fascinating portrait of how someone becomes radicalized. The chapter on John O'Neill, the agent who had worked on the FBI's bin Laden unit until a few weeks before he died on 9/11 is like something out of a movie -- flawed but dogged FBI guy battles terrorists, bureaucracy, and his own demons as the clock ticks down to doomsday.
Check it out.