@XYYZ
I remember a method book he wrote for guitar sight reading of musical notation. Roy Clark's Big Note Guitar Book, promoting an idea that if the notes were written large enough, you would want to try reading them. They were so big, it had the alphabet name inside the note. It probably was published in the early 70's as tablature was gaining popularity and guitar instructors were trying to get students to continue learning standard music notation. Way before the internet proliferated so much tab use. If you had made it through the book one method books, this was a decent supplement. Roy Clark, great musician, studio player, performer, educator, deserves his place in guitar hall of fame.