Assuming you locate the file or buy the book, here are the three pillars of the Goodrick method.
Go buy the physical book. Throw away your picks for a week. Tune your guitar weirdly. Play on one string until you hear melodies you didn't know you knew. That is what "The Advancing Guitarist" means. Mick Goodrick - The Advancing Guitarist.pdf
Most guitarists see the fretboard as six separate grids. Goodrick forces you to view it as one long row of 120+ notes. He asks you to master the fretboard on one string at a time . Why? Because when you can improvise a melody on the high E string without thinking about the shape of a scale, you have liberated your ear from your hand. Assuming you locate the file or buy the
One night at a small club, Leo began a solo. He placed his left hand in his pocket. He played a single B-flat with his right thumb. Held it. Let it decay. The crowd shifted uncomfortably. Then he played the fifth above it—not on the next string, but on the same string, twelve frets up. The interval hung in the air like a question mark. Tune your guitar weirdly