Perhaps the most critical component of Fretboard Mastery is the focus on intervals. Stetina posits that viewing the fretboard through the lens of intervals (the distance between notes) rather than absolute note names is more efficient for real-time improvisation.
The book is structured to move players beyond memorized "boxes" and into a deep, functional understanding of the instrument: Amazon.com Holistic Fretboard Navigation troy stetina fretboard mastery pdf