I am trying to get into the Liturgy of the Hours a bit more, at least to familiarize myself with it.
For a chant enthusiast, the Liber hymnarius is indispensible for the Liturgy of the Hours. Though GIA etc. seem to sell it as basically a collection of hymns, it also contains invitatories and proper antiphons throughout the Church year.
One possible use of this, I am thinking, is as short, manageable chunks of (real) Gregorian chant - yes, communions often fill this slot, but the antiphons just give additional options (and thematic ideas).
Thankfully, CMAA provides a publicly available edition of an old Antiphonale that (correct me if I’m wrong?) should have most of what’s in the LH, if not more?