Sandra Maitri was among the first group of students to whom the Chilean psychiatrist Claudio Naranjo presented the enneagram system in the United States in the early 1970s. Her books include The Spiritual Dimension of the Enneagram: Nine Faces of the Soul (2000) and The Enneagram of Passions and Virtues: Finding the Way Home (2005). She has been teaching the enneagram as part of the larger work of spiritual transformation for more than four decades.