MAX THURIAN is a member of a Protestant religious community, and his book Marriage and Celibacy is his second contribution to the series which the S.C.M. Press is publishing under the general title of Studies in Ministry and Worship. His first book in the series was entitled, Confession. The greater part of the book now under review is concerned with celibacy, and it is clear that the author is by no means the kind of Protestant who assumes that because something is found in the Catholic Church it is therefore bound to be wrong or even wicked. On the contrary, we find that most of what he says about marriage and celibacy agree with Catholic doctrine. The apparently small divergence from Catholic doctrine is, however, most significant; it is like a wedge which with the greatest ease opens up a wide chasm between his whole manner of thought and that of a Catholic theologian.