The Day that Shook America, A Concise History of 9/11 by J.Samuel Walker. A must read account of both human drama and political policy of one of the most important events in U.S. history. This book discusses details about the 4 hijackers and the collapse of the twin towers. The author offers a deep analysis of the approach taken by the Clinton and Bush administrations toward A-Qaeda and terrorism in general. Hardcover.