Ben Hewlett & Paul Lennon: Bones of the Blues (2008)
Diatonic harmonica teach-yourself series - digital book and CD format with playalong backtracks plus notation and tab. Blues tunes in different styles and keys all playable on one C harmonica.
Recommended if you like
Little Walter,
Sonny Boy Williamson,
Sonny Terry,
Sonnyboy Williamson.