John Hardin is a desperate man.  When a train carrying official US currency paper explodes in his town, he's the prodigious Black Diamond Detective Agency's sole suspect.  John is innocent, but his wife is missing, his old friends are coming back to haunt him--with guns and explosives--and he's on the run through rural Missouri.   THE BLACK DIAMOND DETECTIVE AGENCY is based on the historical journals of Arthur James Quindlen, the agency's founder.  Adapted and illustrated with watercolor art by Eddie Campbell, this graphic novel brings a new perspective to that time in America when small farmers were the backbone of the country, graft was rampant, and railroads thundered through western towns.