I am currently reading The Tribe by James Bruno.
Mr. Bruno spent more than 2 decades in the diplomatic service. His writing shows a very deep knowledge of what is going on in Afghanistan, Pakistan and the other "stans" in the area.
I highly recommend this book to anyone who wishes to understand must of the behind the scenes that go on there and some insight into the players who are the ones who put our men and women in uniform in harm's way.
It is available at http://www.amazon.com/Tribe-ebook/dp/B005D3G1MU