The first edition of A.G. Martimort's L' Eglise en Priere, published in 1965, was well received by liturgical scholars throughout the world. The work has now been thoroughly revised and brought up to date. This English translation of Volume IV, The Liturgy and Time, will be welcomed by serious students of the liturgy as well as by liturgical directors and other pastoral ministers. It not only provides sound historical background and theological analysis for understanding the liturgical year and the liturgy of the hours, but it also sets out clear foundational principles for making responsible pastoral decisions.