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.

Sinclair B. Ferguson (PhD, University of Aberdeen) is Chancellor’s Professor of Systematic Theology at Reformed Theological Seminary and the former senior minister of the First Presbyterian Church in Columbia, South Carolina. He is the author of several books, including By Grace Alone and Lessons from the Upper Room. Sinclair and his wife, Dorothy, have four grown children.