For those of interested in the works of St. Thomas Aquinas, this is a good source:
https://www.aquinasinstitute.org/aquinas-opera-omnia. The Works can be accessed online, but I like the hardback, blue volumes, Latin/English side-by-side. They are a bit pricy, but nicely done. During my U of L days I had a professor tell me that only 30% of St. Thomas Collected Works have been translated from the Latin to English. Had it not been for Vatican II, most of St. Thomas would probably be translated by now.
St Thomas died at the age of forty-seven, in 1274. It is astonishing to think of the amount of writing he did, and yet he was not even fifty when he died.