Stephen Prothero believes that religion should be the fourth R and he doesn't pull any punches with the title of his carefully researched book, Religious Literacy: What Every American Needs to Know And Doesn't. For openers, he offers an in-depth consideration of how such a religious country has become so religiously illiterate, how our schools and textbooks have come to obviate the role religion has played in American history and how not the knowing the Bible (Old Testament and New) can diminish our appreciation of Western civilization. You may or may not agree with his remedies, but they are provocative in a positive way. An informative A to Z Dictionary of Religious Literacy follows. It may raise your religious literacy level and, hopefully, inspire you to learn more about your own belief system and the other major religions that motivate millions in this peace-challenged world of ours.