Brad,

The first step in "gettin' down" with blues harmonica is that you no longer call it a harmonica; it's a "harp", "blues harp" or "French harp".

Elderly Instruments has a section on Blues Harmonica. I am not personally familiar with any of the books, but I would recommend the John Sebastian book (with CD) put out by Homespun Tapes. I do so because I have felt they put out a good product.

Good luck with your new goal. Enjoy the music!

Roger in Baltimore