Anthony Summers and Robbyn Swan have written the definitive account of 9/11. The shockwaves of the September 11, 2001 attacks in America reverberate to this day. Though Osama Bin Laden has been killed, questions remain. What exactly happened? Could 9/11 have been prevented? How and why did so much acrimony and misinformation arise from the ashes of the World Trade Center, the Pentagon and a quiet field in Pennsylvania? And what has yet to be revealed?

The Eleventh Day, written with access to thousands of recently released official documents, is updated for this edition - and reports on a development which the former chairman of Congress' 9/11 probe describes as the 'most important in years'.