Fred G. Zaspel (PhD, Free University of Amsterdam) serves as a pastor at Reformed Baptist Church in Franconia, Pennsylvania, an adjunct professor of systematic theology at the Southern Baptist Theological Seminary, and executive editor at Books At a Glance. He is the author of The Theology of B. B. Warfield and Warfield on the Christian Life, coauthor of New Covenant Theology, and has published numerous booklets, articles, and book reviews. Stephen J. Nichols (PhD, Westminster Theological Seminary) serves as the president of Reformation Bible College and chief academic officer of Ligonier Ministries. He has written over twenty books and is an editor of the Theologians on the Christian Life series. He also hosts the weekly podcast 5 Minutes in Church History. Justin Taylor (PhD, The Southern Baptist Theological Seminary) is the executive vice president of book publishing and book publisher at Crossway. He has edited and contributed to several books, and he blogs at Between Two Worlds—hosted by the Gospel Coalition. Michael A. G. Haykin (ThD, University of Toronto) is professor of church history and biblical spirituality at the Southern Baptist Theological Seminary and director of the Andrew Fuller Center for Baptist Studies. He has authored or edited more than twenty-five books, including Rediscovering the Church Fathers: Who They Were and How They Shaped the Church.