During the past three years Peter Toon published articles dealing with various facets of Calvinistic theology in the Age of Reason. These articles were by-products of research he was conducting at London University into the origins of a logical, arid form of Calvinism (hyper-Calvinism) found among Congregationalists and Baptists in the first half of the 18th century.His thesis was completed in March 1967, and with some modifications is now published as a book. Though his study has particular relevance to Strict Baptist, who have become the custodians of hyper-Calvinism, it is also a contribution to our knowledge of the 18th century Nonconformity as well as the history of the development of Reformed doctrine. In the Preface Dr. J. I. Packer states: "The story is a cautionary tale with timely lessons for those who seek a revival of Reformed Christianity today."