The add-on works but can be confusing. I ran the list and it showed I only had 6 more to learn and could only learn them from the Tome of Glyph Mastery. Turns out I still had a dozen or so to learn. I tried a book and it did not teach me one of the 6 glyphs. Keep doing the daily and when you make scrolls but no new glyph, then you buy books and are down to the last 6 glyphs.