If the blues has a truly mythic figure, one whose story hangs over the music the way Charlie Parker's does over jazz or Hank Williams' does over country, it's Robert Johnson, certainly the most celebrated figure in the history of the blues. Of course, his legend is immensely fortified by the fact that Johnson also left behind a small legacy of recordings that are considered the emotional apex of the music itself. These recordings have not only entered the realm of blues standards, but were adapted by rock & roll artists as diverse as the Rolling Stones, Steve Miller, Led Zeppelin, and Eric Clapton.