It would appear so, but having an 8 in Artes Liberales isn't without cost. He's the pure academic, research for research sake, with no ability to apply what he writes about. One can read and understand concepts without being able to efficiently apply them in the field.
So using the rules, as I understand them on a character I'm running. It's Ra'am ex Bonisagus from Phoenix: Ra'am ex Bonisagus
Com +3 Creo 15, Auram 11 Artes Liberales 5, Scribe 2 and Good Teacher virtue.
He could write a 20-25 (21+22+23+24+25=115) level summa on any Art (and I presume a 5th level on any Ability?), but let's presume he'd do it on Creo, as it is his strongest Art.To do the range from 20-25 he needs to write 115 xp worth of information. His skills allow him to write (5+2)*2=14 xp per season, it would take him 9 seasons to write the book. The Quality is where the Art or skill in question comes int play, which in this case it would be 5 (AL) +3 (Mag of Cr) +3 (com) +3 (Virtue)=14
I generally like this. As an academic (and perhaps one who teaches, too?) you should know that one often knows more than they actually end up teaching. Being able to write in excess of one's skill isn't really possible, so it should be limited to the ability/Art in question. Or maybe not, the ability/Art score could represent the capability to implement said knowledge in the field under stressful conditions, something that the academic researcher doesn't usually contemplate. I'm going to ruminate on this for a while.