Time magazine listed him as one of its "100 People Who Shape Our World." Newsweek featured him on its cover under the headline "How Al-Sadr May Control U.S. Fate in Iraq." Paul Bremer denounced him as a "Bolshevik Islamist" and ordered that he be captured "dead or alive." Who is Muqtada al-Sadr, and why is he so vital to the future of Iraq and, arguably, the entire Middle East? In this compellingly readable account, prize-winning...