A superb book, thoroughly recommended which asks a lot of questions, and gives a lot of answers. This puts September 11th and the "War on Terror" in an even more frightening context. Ever wondered why Bush smirked as he told the world america was under attack? Why military planes were noticeable by their absence? Why the US were planning action in Afghanistan at the beginning of 2001 to take place in October? Why the intelligence agencies saw nothing coming? Read this book.
The most frightening thing is that this is not thw work of a wacky conspiracy theorist - the references are reliable (Guardian, Independent, Times, NY Times, CNN, etc.)
But this book if you want to understand the kind of world we live in.