(Music Sales America). In this 2011 revision of the best-selling harmonica book and CD, Jon Gindick continues his fun-loving jam-with-me teaching style. He also shares secrets of the blues harp learned as an author, player and instructor. Step by step, you'll learn the essential blues techniques, from bending to tongue-blocking, to playing train whistles and chugs, and songs both easy and hard, and learn how to put it all together to jam with bands.