Goodrick often presents a concept—such as the permutations of a three-note group—and frankly admits that the exercises could take a lifetime to master. This honesty is refreshing; it reframes the "practice room" not as a place to pass a test, but as a laboratory for endless experimentation.
Unlike many method book authors, Goodrick wasn't interested in selling a system . He was interested in destroying your dependence on systems. Mick Goodrick - The Advancing Guitarist.pdf