Dr. Au is the author of the award winning books, By Way of the Heart: Toward a Holistic Spirituality and The Enduring Heart: Spirituality for the Long Haul. His books have been translated into Spanish, Polish, Chinese, and Korean and published in foreign editions in Great Britain, India, and the Philippines. Dr. Au has served as a member of editorial boards for scholarly journals and is a leader in the field of spirituality and formation for spiritual direction and pastoral ministry.