To download the free audio for The 50 Greatest Guitar Books, please visit: https://presterjohnmusic.bandcamp.com/album/the-50-greatest-guitar-books-audio
The audio is free but you need to click “Buy Digital Album” and type in 0 (zero) in the amount.
I hope enjoy the book and get much practical use out of it.
If you have any issues, questions, or concerns, please feel free to email me at PresterJohnMusic(at)gmail.com