Sinclair B. Ferguson is senior minister at First Presbyterian Church in Columbia, South Carolina, and serves as professor of systematic theology at Westminster Seminary in Dallas, Texas.
J. I. Packer is regarded as one of the most influential evangelicals in North America. He is Board of Governors' Professor of Theology at Regent College in Vancouver, British Columbia, and his writings include books such as , , (Crossway) and . He has preached and lectured widely in Great Britain and North America and served as general editor of the English Standard Version of the Bible published in 2001, and theological editor of the Study Bible version. In 2014, Packer was named Author of the Year by the Association of Logos Bookstores. He is a frequent contributor to and an executive editor of and has written numerous articles published in journals such as and He received a BA, MA and PhD from Oxford University.
David F. Wright (1937-2008) was professor of patristic and Reformation Christianity at New College, University of Edinburgh. He wrote a number of books on both historical and theological topics.