The Cambridge Companion to American Judaism is a comprehensive survey that attempts to cover Judaism as a religion in the United States rather than Jewishness as an ethnicity in this country. The title of this volume thus requires a word of explanation. In popular usage today, Judaism usually implies a broad sociological approach to the subject of Jewish life and culture, while the term Jewish religion suggests a more specific concern with beliefs and practices that are somehow associated with a supernatural reality. Although this collection uses the more general term in its title, its focus is on American Jewish religious phenomena. It is, however, an appropriate title, I believe, because the volume’s essays describe a quite inclusive Jewish religious experience in America. This includes aspects that frequently have been neglected or ignored or are understood as outside the purview of religion by a largely Christian America, which sometimes draws different and more impenetrable boundaries between the sacred and the secular. Understanding the subject in such broad terms, one can see that Jewish religion in America means much more than just religious ritual or belief. Contributors also discuss the sociology, psychology, theology, and history of American Judaism. A number of essays concentrate on the culture of American Judaism, including musical, artistic, and literary expressions.