(Guitar Educational). Untangle the mysterious regions of the guitar fretboard and unlock your potential. Fretboard Mastery familiarizes you with all the shapes you need to know by applying them in real musical examples, thereby reinforcing and reaffirming your newfound knowledge. The result is a much higher level of comprehension and retention. | Fretboard Mastery by Troy Stetina, Book & Toy | Indigo Chapters