The Guide for the Christian Assembly Volume One, written by Thierry Maertens, is a background guide to the daily reading of the Mass, revised in accordance with the new lectionary. This particular volume covers the liturgical season from the First Sunday of Advent to the Sixth Sunday after Epiphany (Christmas). It serves as an in-depth guide to the study of the new liturgical formulations and also shows how the Word of God proclaimed in Sacred Scripture is complemented by His Word found in current events in the world and in Church history. It is intended not only as a resource for the preparation of homilies (sermons) for worship leaders, but also as a resource for the personal communication and prayer life of Christians daily. Overall, volume one provides theological and contextual insights into the Scripture readings during Advent and Christmas, helping people to understand and live out the meaning of God's Word in their lives.