About the Author

DON RICHARD RISO, M.A. (1946-2012) was the foremost writer and developer of the Enneagram in the world and the most-published and bestselling author in the field. The president of Enneagram Personality Types, Inc., and co-founder of The Enneagram Institute, he taught the Enneagram for more than twenty years, pioneering a revolutionary new approach to ego psychology through his 1977 discovery of the Levels of Development. His five bestselling books with Russ Hudson have been published in more than a dozen countries and languages. Mr. Riso was a Jesuit for thirteen years, with degrees in English and philosophy, was elected to the Jesuit Honor Society, Alpha Sigma Nu, and was a Ford Foundation Fellow at Stanford University in communications (social psychology).

RUSS HUDSON is coauthor of five bestselling Enneagram books with Don Richard Riso, including Discovering Your Personality Type, published in more than a dozen countries and languages. The co-founder of The Enneagram Institute and a Founding Director of the International Enneagram Association, he co-developed the Riso-Hudson Enneagram Type Indicator (RHETI) personality test.