Eberhard Arnold (1883-1935), the German author and theologian who started the Bruderhof community, is known for his opposition to Hitler and his influence on contemporaries such as Dietrich Bonhoeffer, Karl Barth, Martin Buber, Martin Niemöller, and Paul Tillich. Some of Arnold’s books available in English are God’s Revolution, Innerland, Why We Live in Community, The Early Christians, and Salt and Light. Richard J. Foster is one of the most trusted spiritual writers of our day. His books include Celebration of Discipline, which was named one of the top ten books of the twentieth century by Christianity Today, selling over one million copies.