Werner Erhard: The Transformation of a Man, The Founding of est is a biography of Werner Erhard by philosophy professor William Warren Bartley, III. The book was published in 1978 by Clarkson Potter. Bartley was professor of philosophy at California State University and had studied with philosopher Karl Popper. He was the author of several books on philosophy, including a biography about Ludwig Wittgenstein. Erhard wrote a foreword to the book. The book's structure describes Erhard's education, transformation, reconnection with his family, and the theories of the est training.