John MacArthur is the pastor-teacher of Grace Community Church in Sun Valley, California, where he has served since 1969. He is known around the world for his verse-by-verse expository preaching and his pulpit ministry via his daily radio program, Grace to You. He has also written or edited nearly four hundred books and study guides. MacArthur serves as the president of the Master's College and Seminary. He and his wife, Patricia, live in Southern California and have four grown children. R. C. Sproul (Drs, Free University of Amsterdam) serves as senior minister of preaching and teaching at Saint Andrew's Chapel in Sanford, Florida, and is the founder and president of Ligonier Ministries. He has taught at numerous colleges and seminaries, has written over seventy books, and is featured daily on Renewing Your Mind, an international radio broadcast. Alistair Begg serves as the senior pastor of Parkside Church near Cleveland, Ohio. He has been in pastoral ministry since 1975 and served eight years in Scotland at both Charlotte Chapel in Edinburgh and Hamilton Baptist Church. He has written several books and is heard daily on the radio program Truth For Life. He and his wife, Susan, have three grown children. Mark Dever (PhD, Cambridge University) is the senior pastor of Capitol Hill Baptist Church in Washington, DC, and president of 9Marks (9Marks.org). Dever has authored over a dozen books and speaks at conferences nationwide. Kevin DeYoung (MDiv, Gordon-Conwell Theological Seminary) is the senior pastor at Christ Covenant Church in Matthews, North Carolina. He serves as a council member at the Gospel Coalition and blogs at DeYoung, Restless, and Reformed. He is assistant professor of systematic theology at Reformed Theological Seminary (Charlotte) and a PhD candidate at the University of Leicester. He is the author of several books, including Just Do Something, Crazy Busy, and The Biggest Story. Kevin and his wife, Trisha, have seven children. Sinclair B. Ferguson (PhD, University of Aberdeen) is professor of systematic theology at Redeemer Seminary in Dallas, Texas, and the former senior minister of the First Presbyterian Church in Columbia, South Carolina. He is the author of several books, the most recent being By Grace Alone: How the Grace of God Amazes Me. Sinclair and his wife, Dorothy, have four grown children. Michael J. Kruger (PhD, University of Edinburgh) is the president and Samuel C. Patterson Professor of New Testament and Early Christianity at Reformed Theological Seminary in Charlotte, North Carolina. Kruger is ordained in the Presbyterian Church in America and also serves as the pastor of teaching at Uptown PCA in Charlotte. He blogs regularly at MichaelJKruger.com and tweets at @michaeljkruger. R. Albert Mohler Jr. (PhD, Southern Baptist Theological Seminary) serves as the ninth president of Southern Seminary and as the Joseph Emerson Brown Professor of Christian Theology. Considered a leader among American evangelicals by Time and Christianity Today magazines, Dr. Mohler hosts a daily radio program for the Salem Radio Network and also writes a popular daily commentary on moral, cultural, and theological issues. Both can be accessed at www.albertmohler.com. Stephen J. Nichols (PhD, Westminster Theological Seminary) serves as the president of Reformation Bible College and chief academic officer of Ligonier Ministries. He is an editor of the Theologians on the Christian Life series and also hosts the weekly podcast 5 Minutes in Church History. Carl R. Trueman (PhD, University of Aberdeen) is the Paul Woolley Professor of Church History at Westminster Theological Seminary and pastor of Cornerstone Presbyterian Church (OPC) in Ambler, Pennsylvania. He was editor of Themelios for nine years, has authored or edited more than a dozen books, and has contributed to multiple publications including the Dictionary of Historical Theology and The Cambridge Companion to Reformation Theology. Nathan Busenitz (PhD, The Master's Seminary) is assistant professor of theology at the Master's Seminary. He previously served on the pastoral staff of Grace Community Church in Sun Valley, California. He is the author of numerous books and a regular contributor to the blog Preacher & Preaching. Ligon Duncan (PhD, University of Edinburgh) is the chancellor & CEO and the John E. Richards Professor of Systematic and Historical Theology at Reformed Theological Seminary. He previously served as the senior minister of the historic First Presbyterian Church in Jackson, Mississippi, for seventeen years. He is a cofounder of Together for the Gospel, a senior fellow of the Council on Biblical Manhood and Womanhood, and was the president of the Alliance of Confessing Evangelicals from 2004-2012. Duncan has edited, written, or contributed to numerous books. Ligon and his wife, Anne, have two children and live in Jackson, Mississippi. Derek Thomas (PhD, University of Wales, Lampeter) is the Robert Strong Professor of Systematic and Practical Theology at Reformed Theological Seminary in Atlanta and minister of preaching and teaching at First Presbyterian Church in Columbia, South Carolina. His many books include Calvin's Teaching on Job, and he serves as the editor for reformation21, the e-zine of the Alliance of Confessing Evangelicals.