J. I. Packer (DPhil, Oxford University) serves as the Board of Governors' Professor of Theology at Regent College. He is the author of numerous books, including the classic best-seller Knowing God. Packer served as general editor for the English Standard Version Bible and as theological editor for the ESV Study Bible. 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. 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. 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. C. J. Mahaney is the senior pastor of Sovereign Grace Church of Louisville. He has written, edited and contributed to numerous books, including Proclaiming a Cross-Centered Theology; Don't Waste Your Sports; and Sex, Romance and the Glory of God. C. J. and his wife, Carolyn, are the parents of three married daughters and one son, and the happy grandparents to twelve grandchildren. 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.