I would highly recommend this book, together with Kenny's earlier 'blues legends' and 'acoustic blues' books. They are basically tab and notation for classic styles, specifically lightnin' hopkins, blind blake, john hurt and gary davis. What works for me is that they give you the basic idea of a piece and allow you to make it your own, rather than slavishly copy every nuance of the original (which I'm not good enough to do anyway). If you want to learn E blues with a mono bass, or G or C ragtime blues with alternating bass, these may be the books for you. No theory is required, and you don't need to re-tune your guitar. I've found them to be the most accessible, and they're worth the money.
- (Chessington, United Kingdom)