The Celestine Prophecy
The Celestine Prophecy: An Experiential Guide (with Carol Adrienne)
The Tenth Insight: Holding the Vision
The Tenth Insight: An Experiential Guide (with Carol Adrienne)
The Celestine Vision: Living the New Spiritual Awareness
The Secret of Shambhala: In Search of the Eleventh Insight
God and the Evolving Universe: The Next Step in Personal Evolution (with Sylvia Timbers and Michael Murphy)