Book excerpt: Geoffrey F. Nuttall establishes the primacy of the doctrines of the Holy Spirit in seventeenth-century English Puritanism and demonstrates the continuity of the Reformation tradition from the more conservative views of Luther to the more radical interpretations of the Quakers. Nuttall illuminates prominent spokesmen, including Richard Sibbes, Richard Baxter, John Owen, Walter Cradock, Morgan Llwyd, and George Fox. In a new Introduction, Peter Lake discusses the relevance of Nuttall's book to, and its influence on, major works in seventeenth-century English history written since 1946.