This is an edited work, and I know the work of many of the authors. It is an essential reference, and has additional value for being an update.
Just as we now know that the Warren Commission was a cover-up, and that JFK was murdered by Cuban exiles who used their CIA training and equipment (intended for Castro) to murder JFK and set up Oswald (see Someone Would Have Talked: The Assassination of President John F. Kennedy and the Conspiracy to Mislead History, we now also know that the 9-11 Commission was at best a grotesque combination of neophytes and compromised corrupt individuals, and at worst, a very deliberate red herring.
APPENDIX: 16 Questions on the JFK Assassination by Bertrand Russell in this book is an extraordinary offering. His questions were asked prior to the Warren Commission, and represent the ease with which intelligent citizens can question their government and get at the truth.
I strongly recommend this book, as well as the others listed below, in general order of preference. Use my reviews as executive summaries.
9/11 Synthetic Terror: Made in USA, Fourth Edition
Vice: Dick Cheney and the Hijacking of the American Presidency
Rule by Secrecy: The Hidden History That Connects the Trilateral Commission, the Freemasons, and the Great Pyramids
Crossing the Rubicon: The Decline of the American Empire at the End of the Age of Oil
Web of Deceit: The History of Western Complicity in Iraq, from Churchill to Kennedy to George W. Bush
Weapons of Mass Deception: The Uses of Propaganda in Bush's War on Iraq
The Looming Tower: Al Qaeda and the Road to 9/11 (Vintage)
The Sorrows of Empire: Militarism, Secrecy, and the End of the Republic (Blowback Trilogy)
The Bush Tragedy
I also recommend all the 9-11 DVDs, easily found by searching Amazon DVD for 9-11, but there are few that are not available on Amazon and are truly extraordinary.
Finally, for the good news, see my briefings to Hackers on Planet Earth this past week, both at the Earth Intelligence Network site, and also the older briefings to Gnomedex and Amazon Developers Conference, via EIN at the EarthWiki. We the People are almost at a point where we can crush the government with truth–non-violent inescapable truth.