"Comprehensive introduction to recorded blues ever assembled, drawing styles, record labels, and eras together with the efficiency of a spider#x92;s web. These five discs--tied to the hit-and-miss PBS film series Martin Scorsese Presents the Blues--embrace field hollers, early queens Ma Rainey and Bessie Smith, the music#x92;s first composer W.C. Handy, Delta slide guitarists, string bands, piano barrelhousers, jazz geniuses Count Basie and Lionel...