Probably the best book available about 9/11. With well over 600 pages, this is the result of very serious research. Ruppert works from published sources and does not build his case upon speculation and rumour. His conclusions are none the less damning, however, and I believe he builds an almost unanswerable case for the proposition that the US Administration were complicit in the events of September 11th 2001.
Buy it from Amazon (UK)