Joel R. Beeke (PhD, Westminster Theological Seminary) has written over one hundred books. He is chancellor and professor of systematic theology and homiletics at Puritan Reformed Theological Seminary; a pastor of the Heritage Reformed Congregation in Grand Rapids, Michigan; the editor of Banner of Sovereign Grace Truth; the board chairman of Reformation Heritage Books; the president of Inheritance Publishers; and the vice president of the Dutch Reformed Translation Society.

Paul M. Smalley (DD, Puritan Reformed Theological Seminary) is faculty research and teaching assistant to Joel Beeke at Puritan Reformed Theological Seminary. He is also a part-time pastor at Grace Immanuel Reformed Baptist Church in Grand Rapids, Michigan, and previously served for twelve years as a Baptist pastor in churches in the midwestern United States.