Let’s address the elephant in the practice room. The search term "Mick Goodrick - The Advancing Guitarist.pdf" is highly specific. Why?
The Hard Truth: You can find the PDF on various file-sharing sites. However, The Advancing Guitarist is a workbook. Reading a pirated PDF on a phone screen while trying to play guitar is impossible. The book is designed to be splayed open on a music stand, coffee-stained, and written in. Buy the physical copy. It is $20. You will save 10 hours of searching for a clean scan.
If you cannot afford the book or live in a region where shipping is difficult, here is the "Open Source" Goodrick method (gleaned from interviews with his students): Mick Goodrick - The Advancing Guitarist.pdf
Searching for "Mick Goodrick - The Advancing Guitarist.pdf" is a rite of passage for the serious guitarist. It signals that you are tired of being a "pattern player." It means you are ready to confront the fretboard as a pure, mathematical, beautiful grid.
But remember this: A scanned PDF is just a ghost. The real book has almost no ink on most pages. The real book is a series of questions. Goodrick does not give you answers; he gives you better questions. Let’s address the elephant in the practice room
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.
Stop looking for the file. Start looking for the music. The Hard Truth: You can find the PDF
Note to the reader: If you hold a copy of The Advancing Guitarist, check page 44. If you haven't completed the exercise on "Playing what you hear vs. Hearing what you play," you haven't actually started the book.
Mick Goodrick’s "The Advancing Guitarist" is a foundational jazz guitar text that acts as a "do-it-yourself" philosophical guide rather than a standard method book. It focuses on fostering musicality through exploring fretboard mechanics, such as one-string playing, and voice-leading, mentoring generations of musicians to move beyond standard shapes. Detailed insights are available in a review by Serge Pierro.
This is the section that breaks most players. Goodrick suggests (provocatively) that you tune your guitar so that open strings spell a C major scale (C-D-E-G-A). The moment you do this, every open string becomes a chord tone. The PDF explains why this unlocks harmonic thinking, even if you never actually retune.