Hi, again,
I've added three books to the list since last month: Honkers and Shouters: The Golden Years of Rhythm and Blues by Shaw (Excellent souce of detailed info. on King artists); They Say in Harlan County by Portelli (Good background on Appalachia and the migration to Cincinnati, Detroit); and Bob Dylan in America by Wilentz (a famous historian's biography of a popular musician; good detail on blues influences on popular music, esp. Blind Willie McTell from Atlanta)