Dr. Soper, emeritus professor of the history of religion, Everett Biblical Institute, Evanston, Illinois, is already well known as the author of The Religions of Mankind and The Philosophy of the Christian World Mission. He is well qualified to call attention to what he considers one of the most dangerous opponents Christianity has ever had, the system of Hindu philosophy known as Vedanta. This ancient faith is being restated in such a way, and being promoted with something resembling missionary enthusiasm, that it is securing the loyalty of a large number of followers in the West. The danger to Christianity lies in its propositions of acceptance. Christians are told that they can accept the Vedanta philosophy without separating themselves from the Christian faith. Hinduism admits the validity of all religions, and historic Christianity is absorbed into a sub-Christian philosophy in which the essential meaning of Christianity is dissolved into mere words. In pointing up this danger, Dr. Soper describes with beauty and power the essential Christian position which cannot he thus compromised if it is to survive. All ministers and serious students of religions will be grateful to the author for his lucid treatment of a problem growing increasingly serious.