Nancy Guthrie teaches the Bible at her church, Cornerstone Presbyterian Church in Franklin, Tennessee, and at conferences worldwide. She and her husband, David, are the cohosts of the GriefShare video series used in more than 10,000 churches nationwide and also host Respite Retreats for couples who have experienced the death of a child. Guthrie is also the host of Help Me Teach the Bible, a podcast of the Gospel Coalition. Skip Ryan is Senior Minister of Park Cities Presbyterian Church in Dallas and has served as Moderator of the General Assembly of the Presbyterian Church in America. Skip is also an instructor for the Japanese Institute for Church Growth in Tokyo. He is a graduate of Harvard University and Westminster Theological Seminary. John Piper (DTheol, University of Munich) is the founder and teacher of desiringGod.org and the chancellor of Bethlehem College & Seminary. He served for 33 years as the senior pastor of Bethlehem Baptist Church in Minneapolis, Minnesota, and is the author of more than 50 books, including Desiring God, Don't Waste Your Life, This Momentary Marriage, Bloodlines, and Does God Desire All to Be Saved? 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. Randy Alcorn (MA, Multnomah University) is the founder and director of Eternal Perspective Ministries and a New York Times best-selling author of over fifty books. His books have sold over nine million copies and been translated into nearly seventy languages. Alcorn resides in Gresham, Oregon, with his wife, Nanci. They have two married daughters and five grandsons. 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. Recognized internationally for his work in Christianity and culture, Francis A. Schaeffer authored more than twenty books, which have been translated into a score of languages and sold millions worldwide. He and his wife, Edith, founded L'Abri Fellowship international study and discipleship centers. Schaeffer passed away in 1984, but his influence and legacy continue worldwide. 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. Joni Eareckson Tada is founder and CEO of the Joni and Friends International Disability Center, which ministers to thousands of disabled people and their families through programs of practical encouragement and spiritual help. She is also an artist and the author of numerous best-selling books such as Joni; Heaven: Your Real Home; and When God Weeps. Martin Luther (1483-1546) was professor of Bible at Wittenberg University, and many of his expositions came out of his classroom. Considered one of the most powerful discussions of justification by faith written by any of the Reformers, this commentary on Galatians has had a profound impact on many through the centuries. TIMOTHY KELLER is founder and pastor of Redeemer Presbyterian Church in New York. He is the best-selling author of The Prodigal God and The Reason for God. Martyn Lloyd-Jones (1899-1981), minister of Westminster Chapel in London for 30 years, was one of the foremost preachers of his day. His many books have brought profound spiritual encouragement to millions around the world. JONATHAN EDWARDS (1703-1758) was a pastor, theologian, and missionary. He is generally considered the greatest American theologian. A prolific writer, Edwards is known for his many sermons, including "Sinners in the Hands of an Angry God", and his classic Treatise Concerning Religious Affections. Edwards was appointed president of the College of New Jersey (later renamed Princeton University) shortly before his death. CHARLES H. SPURGEON (1834-1892) was an English Baptist pastor at New Park Street Chapel, London (which later became the Metropolitan Tabernacle), for thirty-eight years. As the nineteenth century's most prolific preacher and writer, his ministry legacy continues today. 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. JOHN CALVIN (1509-1564) was perhaps the preeminent theologian of the Reformation. Known best for his Institutes of the Christian Religion, he also wrote landmark expositions on most of the books in the Bible. 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. Raymond C. Ortlund Jr. is the pastor of Immanuel Church in Nashville, Tennessee. He is the author of several books, including the Preaching the Word commentary on Isaiah, as well as a contributor to the ESV Study Bible. He and his wife, Jani, have four children. J. C. RYLE (1816-1900) was a prominent writer, preacher, and Anglican clergyman in nineteenth-century Britain. He is the author of the classic Expository Thoughts on the Gospels and retired as the bishop of Liverpool. JAMES MONTGOMERY BOICE was senior minister of the historic Tenth Presbyterian Church in Philadelphia for thirty years and a leading spokesman for the Reformed faith until his death in June 2000. R. Kent Hughes (DMin, Trinity Evangelical Divinity School) is senior pastor emeritus of College Church in Wheaton, Illinois, and visiting professor of practical theology at Westminster Theological Seminary in Philadelphia, Pennsylvania. Hughes is also a founder of the Charles Simeon Trust, which conducts expository preaching conferences throughout North America and worldwide. He serves as the series editor for the Preaching the Word commentary series and is the author or coauthor of many books. He and his wife, Barbara, live in Wyncote, Pennsylvania, and have four children and an ever-increasing number of grandchildren.