In the present volume on problems of moral theology, Dr. McCarthy deals with questions concerning the Commandments. His first volume-on the Sacraments-having dealt largely with matters relating to ecclesiastical law, he now turns his attention to the principles governing conduct which stem from natural and revealed sources of knowledge. As in his first volume, he again approaches his subject by way of posing and solving particular problems. The result is that his work is very far indeed from being a dry exposition of abstract ethical principles. Practical difficulties in their application are raised and squarely faced in a manner which attracts and holds the reader's interest. Dr. McCarthy shows himself to be a master not only of speculative and practical moral theology but of many fields of technical knowledge. His work gives evidence of a profound grasp of civil law, medical science and psychiatry, as well as of a host of other domains which touch on his subject' Medical men, in particular, will find in this book as complete a system of medical ethics as they are likely to need. The most modern problems regarding the morality of psycho-surgery, drugs, etc., are dealt with against a background of the most up-to-date knowledge. For all those whose profession entails dealing with complex human problems, Dr. McCarthy's work must appear indispensable' It provides an authoritative account of Christian moral principles and of their application to concrete situations. Throughout, the author can be relied upon not only for doctrinal accuracy but for a sympathetic understanding of human predicaments.