Matthew Barrett (PhD, The Southern Baptist Theological Seminary) is associate professor of Christian theology at Midwestern Baptist Theological Seminary, as well as the founder and executive editor of Credo Magazine and the host of the Credo Podcast. He is the author of several books, including None Greater; 40 Questions About Salvation; God’s Word Alone; and Owen on the Christian Life. He is the editor of The Doctrine on Which the Church Stands or Falls and Reformation Theology. 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. 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. Carl R. Trueman (PhD, University of Aberdeen) is professor of biblical and religious studies at Grove City College. He is a contributing editor at First Things, an esteemed church historian, and a fellow at the Ethics and Public Policy Center. Trueman has authored or edited more than a dozen books, including Strange New World; The Rise and Triumph of the Modern Self; and Histories and Fallacies. He is a member of the Orthodox Presbyterian Church.