In its final report, the 9/11 Commission famously called the Kingdom of Saudi Arabia "a problematic ally in combating Islamic extremism." To Gerald Posner, the bestselling author of Why America Slept: The Failure to Prevent 9/11, this is a gross understatement. In his new book, Secrets of the Kingdom, Posner exposes the undeniable truth about U.S.-Saudi relations-and how the Saudis' influence on American business and politics poses a grave threat to our security.