Phyllis J. Le Peau worked with InterVarsity Christian Fellowship for over two decades in St. Louis and the Chicago metro area. She is the author or coauthor of several Bible study guides, including Ephesians, Women of the New Testament, and Grandparenting in the LifeGuide Bible Studies series. She and her husband, Andy, have four married children and thirteen grandchildren.

John Stott served as rector of All Souls Church in London and was honored by Time magazine in 2005 as one of the "100 Most Influential People in the World." His many books, including Basic Christianity and The Cross of Christ, have sold millions of copies around the world and in dozens of languages.