J. I. Packer (1926–2020) is regarded as one of the most well-known theologians of our time. Once named to Time magazine's list of the 25 Most Influential Evangelicals in America, Packer served as Board of Governors' Professor of Theology at Regent College in Vancouver, British Columbia. His books include Knowing God, Praying, A Quest for Godliness, Evangelism and the Sovereignty of God, and Rediscovering Holiness.

Carolyn Nystrom (MA, Wheaton College) has written more than eighty books, Bible study guides and children's titles. She served as general editor for the Christian Classics series and she co-authored Guard Us, Guide Us and Prayingwith theologian J. I. Packer, and Before I Was Born (God's Design for Sex) with Sandra Speidel. In addition to actively serving in her church and community, she has been a foster parent, an elementary schoolteacher and a book editor. Carolyn lives in the Chicago area with her husband and they have four grown children.