(Guitar Educational). This convenient reference features easy-to-read diagrams of the most commonly used chords, including 30 chord qualities for each root note for a total of more than 350 chords. Includes an interesting introduction on the history of the 7-string guitar, a handy diagram of the complete 7-string fingerboard, basic chord theory, 7-string guitar tab manuscript paper, and notes explaining how to use the book. Covers all styles of music. | 7-String Guitar Chord Book by Chad Johnson, Paperback | Indigo Chapters