"In 'Mint Condition' is a captivating history of this cherished hobby, as well as a look into the current state, where cards are largely the rarefied preserve of fanatical adult collectors and shrewd businessmen...'--Dust jacket.

With his ability to travel through time using baseball cards and photographs, thirteen-year-old Joe and his mother go back to 1863 to ask Abner Doubleday whether he invented baseball, but instead find themselves in the middle of the Battle of Gettysburg.