Tonight my dad and I were figuring out the differences between the "Christian Prayer Book",
and the actual "Four Volume set of the Divine Offices."
We figured out that the "Christian" is the smaller version where the hymns, and such are recycled year round. While the "Four Set" has individual prayers for each day. I've been praying the "Four Volume" set for some while now. My dad is going to order the "Christian" because it has the psalm tones in the back.