This formidable two-volume work represents the thought of some of the Catholic world's most eminent specialists on the liturgical reform movement inspired by the Second Vatican Council. It is not intended to be an exhaustive study of all aspects of the conciliar Constitution on the Sacred Liturgy, but rather an introduction to the over-all significance of the document with a view toward practical application at the local level. Among the authors of the twenty-four essays are Joseph Jungmann, S.J., Adrien Nocent, O.S.B., and William J. Leonard, S.J. whose ""Liturgical Movement in the United States"" is a masterful historical precis of the liturgical reform's progress in America from its inception to the present time. There is an unusually detailed index. Despite the size and scholarly competence of this work, it is not a book solely for the specialist but also for the priest, religious, and layman without specialized training in the liturgy, and it may be recommended without reservation to such readers.