When a foreign book on sacramental theology described as a classic in its field-- as this one is identical by the publishers -- appears, one cannot help but wonder why it took a decade to translate it for the benefit of an American audience. After reading it, the reason unfortunately is clear. It is no limited in interest that the price suggests an extremely small press run. This is a good example of how the ecclesiologist -- experts in different phase in the life of the Church -- continue to talk to themselves and fail to concentrate on transmitting the benifits of their work to those who can benefit the most, the faithful. Dom Casel did make a mark for himself in his field by arguing for a ""mystery"" theology which held that the ""mystery"" was not a mysterious truth beyond reason, but a reality -- a living reality, yet communicated. The Church's worship is the way through which he now it . This distinction certainly will challenge the thinking of the professional will do little to transmit the message to the people. May the few who had American edition of the thinking of Dom Casel profit from the book. Perhaps it will plant a germ of an idea in the mind of a reader eventually to write a book which will indeed clarify the integral role of Christian worship n the life of the Church. Imprimatur.