Book excerpt: Many aspects of religion are puzzling these days. This book looks at ways of improving our understanding of religious change by strengthening the links between social theory and the social scientific study of religion. It clarifies the social processes involved in constructing religion and non-religion in public and private life. Taking illustrations of the importance of these boundaries from studies of secularisation, religious diversity, globalisation, religious movements and self-identity, James A. Beckford reviews the current state of social scientific knowledge about religion.