Dallas Willard (1935-2013) was a professor in the School of Philosophy at the University of Southern California in Los Angeles for over forty years. A highly influential author and teacher, Willard was as celebrated for his enduring writings on spiritual formation as he was for his scholarship. His books include ( Book of the Year in 1998), and others. His books have received numerous Annual Book Awards and other recognitions. Willard served on the boards of the C. S. Lewis Foundation and Biola University, and was a member of numerous evaluation committees for the Western Association of Schools and Colleges. He received bachelors degrees from both Tennessee Temple College and Baylor University and a graduate degree at Baylor University, as well as a PhD from the University of Wisconsin in Philosophy and the History of Science.
Richard J. Foster (D.Th.P., Fuller Theological Seminary) is founder of Renovaré in Denver, Colorado. He is the author of many books, including which has sold over two million copies worldwide, , and coauthor (with Gayle Beebe) of
John Ortberg is teaching pastor of Menlo Park Presbyterian Church and author of many books, including