Richard J. Foster is the author of several bestselling books, including <i>Celebration of Discipline</i>, <i>Streams of Living Water</i>, and <i>Prayer</i>, which was <i>Christianity Today</i>'s Book of the Year and the winner of the Gold Medallion Award from the Evangelical Christian Publishers Association. He is the founder of Renovaré, an intrachurch movement committed to the renewal of the Church in all her multifaceted expressions, and the editor of The Renovaré Spiritual Formation Bible.