Okay, so I'm looking at Covenants and it says "Most Summae traded within the Order are written by specialists in an art, but with no particular skill in teaching." The it outlines that the lowest a sound book score can be is 28-quality.
Now I took this to mean experts but with low or no communication and defiantly not any virtues. Well I put this to the test with Philippus Niger, Protector of Durenmar, who is the oldest and considered most powerful of the Apromar School of Flambeau. So he is one of the best, if not the best Perdo wielder in the Order. He is 125 years old and has an 8 warping score, so he is approaching twilight. He also has a com of +1, which seems to fall right in line with the "No particular skill in teaching" thing.
He can't even get past 24. Without resonance, his work is considered vain. With both resonance, he hits 26, clarification 27.... So one of the best, if not the best, Perdo wielders can't write a Sound book? It seems to fly in the face of "no particular skill in teaching" being able to put out a book of 28-31. He would need a com+virtue total of +5 or gain 8 more levels in Predo placing him at a skill of 43 (211 exp and only because he has affinity), which flies in the face of not being a good teacher. He has about 40 years left, so he would have to take 10 of those and just sink them into Predo. That seems a bit over the top to me.
This also means to me it is near impossible for a magus, without affinity, who focuses on 1 art for most of his life to ever write a book that is worth reading without an insane com + virtue. Again, it seems a bit much.
Am I missing something here?