Guess what? There are old books that were specifically written to teach the Latin texts found in the Traditional Divine Office.
Textbooks for Learning the Latin Divine Office
VTF: Medieval and Late Latin Selections
This just in! Newly in the Public Domain in the USA as of 2021, Medieval and Late Latin Selections (for the Use of College Students) by Charles Upson Clark and Josiah Bethea Game. My waiting to share this treasure is finally over!
