Barack Obama has invited his old pal Joe Biden to meet a wealthy benefactor whose endorsement could turn the tide for Joe if he decides to run for president. The two friends barely have time to catch up before another mystery lands in their laps: Obama's prized Blackberry is stolen. When their number-one suspect winds up full of lead on the South Side, the police are content to write it off as just another gangland shooting. But Joe and Obama smell a rat ... The new Obama Biden mystery.