David A. Cooper has studied mysticism for more than thirty years. His main practice has been spiritual retreats and meditation in a number of traditions, including Sufi, Vipassana, Kabbalah, Dzogchen and Zen. Cooper is the award-winning author of many books, including The Handbook of Jewish Meditation Practices: A Guide for Enriching the Sabbath and Other Days of Your Life; Silence, Simplicity and Solitude: A Complete Guide to Spiritual Retreat at Home and Three Gates to Meditation Practice: A Personal Journey in Sufism, Buddhism, and Judaism.