We have DAILY readings of Scripture:
1. USUALLY the first reading is from the Old Testament.
2. The second reading is USUALLY from one of St. Paul's letters.
3. The gospel is read. (Then the homily.)
All readings are completed in a three-year cycle. Then, we repeat the same three-year cycle. MUCH (but not every single word) of the Bible is read in that three-year cycle.
I do readings during the week and I was very nicely given a pronunciation guide to those Old Testament names. VERY handy.
All well and good, to get those readings from the ‘book of information’. The ‘official pronouncements’ would be the Catholic Church proclaiming it as the Word of God, when fellow Catholics refer to it openly as a ‘book of information’. That’s on of the main disconnects between Catholics and Protestants.