Liturgy of the Hours Volume 1 | Official Divine Office BookDeepen your prayer life with the official English edition of the Liturgy of the Hours Volume I, the Church's Divine Office for the Advent and Christmas seasons. Published by Catholic Book Publishing and approved by the International Committee on English in the Liturgy, this beautifully crafted prayer book invites you into the ancient rhythm of praying the hours alongside the universal Church. With 1,728 pages of psalms, canticles, readings, and