
Check out their website: Del Rey and Steve James.
I met Steve at Blues Week back around 1994. I don't play guitar, but I sat in the back of a couple of classes and just enjoyed his style.
I cleaned up my tab for Sonny Boy's Help Me and made it into a short book. There's a Kindle version for 99 cents, and if you buy the paperback you get the Kindle free.
Playing "Help-Me" In the Style of Sonny Boy Williamson II: A step by step, note for note analysis of some of Sonny Boy's Signature Riffs