When Caryl Chessman appeared on the cover of Time's March 21, 1960 issue, he was the most famous prisoner in America and arguably the best-known in the world. He not only put a face on the issue of capital punishment, he made one of the most remarkable transformations by any American writer. Through access to the papers and letters of his attorneys, George T. Davis and Rosalie Asher, the unpublished manuscripts and papers held by Joseph Longstreth;...