What is the name of the book that Catholics study?

All types of Christianity have the Holy Bible.

Catholic AnswerCatholics use many books, for the Eucharist (Mass) they use a Missal, to pray the daily Office they use a Breviary. Many of the faithful have a Prayerbook that they use each day. The readings for the Mass are contained in the Lectionary, which contains all the readings from The Bible for each individual Mass, feast, and day of the year. Catholics also rely on the Bible, there are several different translations available in English. There are a wealth of other books for spiritual reading, for retreats, for meditations, for growing in the spiritual life. Check out any good Catholic bookstore or website.