The Mystic Heart: Discovering a Universal Spirituality in the World's Religions
The Relaxation Response
The World's Religions (Plus)
Mysticism and the Spiritual Quest: A Crosscultural Anthology
Behind the Mind
World Religions
Supplements to A Course in Miracles
The Surrender Experiment: My Journey into Life's Perfection
Apprentice to the Masters: Adventures of a Western Mystic, Part II (Volume 2)
The Ultimate Truth (About Love & Happiness): A Handbook to Life