I highly recommend the new book by Philip Shenon called The Commission: The Uncensored History of the 9/11 Investigation . I reviewed and interviewed Shenon on Huffington Post, which you can read here - just do a search for my name on Huff Po and it will come up- http://www.huffingtonpost.com/elizabeth-benedict/philip-shenons-commi_b_90481.html