George Goodman's Harmonica Cheat Sheet is a combination of three great tools to kick-start your harmonica playing. Included are - The Blues Harp Chart: provides chords, cross harp key, 12 Bar Blues Progression, and Blues Scale harmonica tabs covering all 12 keys. - Major Key Degrees of Scale: unveils blow and draw holes for all diatonic chord tones. These are the notes that make up the majority of notes in any melody. It is also very valuable in helping determine song keys and transposing songs to new keys. - Circle of Fourths and Fifths: makes sense of playing in positions and teaches how to choose the correct key harmonica depending on the key and style of a song. Bottom line - pick the right key harmonica, then find the notes that make up the melody.