Scales, Patterns, & Bending Exercises 2: Level 3 (David Barrett's Harmonica Masterclass Complete Blues Harmonica Lesson Series) Paperback – 28 February 2001

Expensive but useful. If you are learning then by this time you should be able to come up with the scales yourself. However, this will: save you the time, give you good exercises and provide a bare minimum of info on the Lee Oskar tunings available.