Just finished 2 books...
Weigel's Faith, Reason, and the War Against Jihadism: A Call to Action is a crisp little book. It packs a huge wallop in 157 pages. He outlines 15 lessons all of us in the West (the U.S. specifically of course) should draw from 9/11. He was preaching to the choir with me, put he puts things so succinctly it is a great refresher (a "call to action" as the title says). This is a great book to buy for others -- especially for those who are possible 9/11 Republicans -- Dems who are reasonable... Hitchens, Ron Silver types. Maybe not Hitchens as Weigel is a devout Catholic and advocates religion as one of the major cultural tools to fight this war. I'm using this as one of the texts in my Terrorism course this Fall.
Max Boot's book, War Made New: Technology, Warfare, and the Course of History 1500 to Today is also fantastic. I loved Boot's Savage Wars of Peace and this one did not disappoint either. I knew alot of this information already, but Boot ties it all together neatly and with great insight. Victor Hanson has a lock on culture and war, but Boot deftly deals with technology, economics, culture, etc. to show the transformation of the way wars are fought -- and how today's wars are also similar to yesterdays' wars. Suffice to say that technology is not the end all be all... good soldiering and competent officers will always be required.
Book I'm currently reading (and have had on my list for 20 years):