In the four volumes of the Liturgy of the Hours, the official daily prayer of the Catholic Church, there are nearly 600 selections from the writings of Fathers and saints. Seeing the potential of this vast collection as a theological resource, Milton Walsh has organized these selections by topics according to the four pillars of the . This topical concordance allows the reader to compare what the various authors have written on the same themes, while a chronological timeline of the readings shows their relationship to each other in time. Walsh has also provided background on the liturgical celebrations of the Church, as well as historical information on each author. In addition, there is a chapter on how patristic readings can assist in understanding the Bible. This fresh and original presentation of material that is literally at the fingertips of anyone praying the Liturgy of the Hours can be a tremendous aid to both religious devotion and theological study.