Dr. Haykin has authored The Spirit of God: The Exegesis of 1 and 2 Corinthians in the Pneumatomachian Controversy of the Fourth Century ; One Heart and One Soul: John Sutcliff of Olney, His Friends, and His Times; Kiffin, Knollys and Keach: Rediscovering Our English Baptist Heritage (Reformation Today Trust, 1996); ‘At the Pure Fountain of Thy Word’: Andrew Fuller as an Apologist ; Jonathan Edwards: The Holy Spirit in Revival ; The God who draws near: An Introduction to Biblical Spirituality, and Rediscovering the Church Fathers: Who They Were and How They Shaped the Church.