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 (ThM, Puritan Reformed Theological Seminary) is faculty teaching assistant to Joel Beeke at Puritan Reformed Theological Seminary. He previously served for twelve years as a pastor in the Baptist General Conference in the midwestern United States.