Billy is an unparalleled source of historical information about the development of the harmonica in this century. After delivering an informative and entertaining introduction about the instrument he loves, Billy walks and talks you through the important aspects of the styles of both Sonny Boys and the two Walters. Each artist's work is demonstrated by a performance with rhythm section backing and then a clear, concise explanation. Topics covered include playing in first, second and third positions, note bending, trills, back up accompaniment and playing minor blues. Billy shows it all with diatonic and chromatic harmonicas, spicing his musical analysis with anecdotes and gentle humor. A booklet with the main musical examples transcribed combines with the DVD in the definitive method for learning classic Chicago blues harmonica.