"Jazz Theory" is a good book, but I think the average person wanting to "learn music theory" would find the excellent "Jazz Harmony Book" by the same publisher

"Jazz Theory" is a good book, but I think the average person wanting to "learn music theory" would find the excellent "Jazz Harmony Book" by the same publisher much more accessible, certainly not easy, but by no means the slog/reference-style-book that "Jazz Theory" is. Link is here: https://www.shermusic.com/1883217792.php https://www.shermusic.com/1883217792.php