Don Carson (BS, McGill University; MDiv, Central Baptist Seminary, Toronto; PhD, University of Cambridge) is emeritus professor of New Testament at Trinity Evangelical Divinity School in Deerfield, Illinois, and cofounder (retired) of The Gospel Coalition. He has edited and authored numerous books. He and his wife, Joy, have two children.
Tim Keller (MDiv, Gordon-Conwell Theological Seminary; DMin, Westminster Theological Seminary) was founder of Redeemer Presbyterian Church (PCA) in Manhattan, chairman of Redeemer City to City, and co-founder of The Gospel Coalition. He wrote numerous books, including The Reason for God. He and his wife, Kathy, had three children.
John Piper (BA, Wheaton College; BD, Fuller Theological Seminary; ThD, University of Munich) serves as founder and lead teacher at Desiring God and is chancellor of Bethlehem College & Seminary. For 33 years, Piper served as pastor of Bethlehem Baptist Church, and he is a Council member of The Gospel Coalition. He has authored more than 50 books, and more than 30 years of his preaching and writing are available free of charge at Desiring God.