Barack Obama's keynote speech at the 2004 Democratic National Convention instantly catapulted the little-known state senator from Illinois into the national spotlight. Three months later, Obama would win election to the U.S. Senate; four years later he would make history as America's first black president. Now, at the end of his second presidential term, David J. Garrow delivers the most compelling and comprehensive Obama biography - as epic in vision and rigorous in detail as Robert Caro's The Power Broker.