Volume Five of this translation of the Rationale Divinorum Officiorum contains Book Six of this work. Here consideration is given to the Offices of Sundays and their services, ember fasting, and other festivals. Through one hundred and forty-three chapters Durandus carries his readers through the liturgical year. In doing so he opens the door for his readers to a comprehensive understanding of the significance of the various parts of the annual Church cycle. This book provides an excellent companion as one journeys through the year. Indeed, its scope is so extensive a single year may well prove insufficient to fully absorb and appreciate all it contains. The translator of this work, Janet Gentles, has spent over forty years exploring the spiritual foundations of both Christianity and Judaism as both assist in gaining an understanding of the profound teachings of the Bible. The Rationale Divinorum Officiorum provides a substantial contribution to such understanding.