Book excerpt: Blues Harmonica Play-Along Trax, within the School of the Blues Lesson Series, is an exciting play-along that contains the most common grooves used in blues bands today. Notated examples for the ten hole diatonic harmonica are provided as well to give you an idea of how you can approach accompanying a vocalist or instrumentalist. Along with the 15 jam tracks, the book is accompanied by a CD recording of all examples (played by author David Barrett) along with the background music.