A book written by US Democratic presidential candidate Barack Obama is held by a supporter at a rally in Boston

 
A book written by US Democratic presidential candidate Barack Obama is held by a supporter at a rally in Boston
A book entitled "The Audacity of Hope", written by US Democratic presidential candidate Barack Obama, is held by a supporter during an Obama campaign rally in Boston, Massachusetts, February 4, 2008 on the eve of the "Super Tuesday" primaries. REUTERS/Jason Reed (UNITED STATES) US PRESIDENTIAL ELECTION CAMPAIGN 2008 (USA)