The author of Address Unknown has written what was -- for me at least -- the first clear cut story of the various ramifications of the underground war within the church in Nazi Germany. It is being published as fiction. Perhaps the slender thread of romance is fictional. But the interest of the book lies in the factual record of the step-by-step strangulation of the outward organization of the Lutheran Church, which faith embraces an estimated two thirds of the German people, and the paralleling of a strong underground organization which kept alive the spirit of true religion and the old Germany. Absorbingly told around the person of a young theological student, who finally escapes to America, in 1937-38. But those tragic years when the hold of Nazis and of the Leader was forged are given from a new angle. The story gathers pace slowly. The writing at first seems halting, amateurish. But -- as the pattern forms, the importance of the message to the Christian world overweighs the form of the story, and Until That Day emerges as a book that should be read by everyone who has listened to the false evidence offered to prove that Hitler has permitted religion to go unchecked.