Ophiel, who died in San Francisco in 1988 at age 84, was an eclectic teacher and thinker, with an uncanny ability to make esoteric ideas understandable and available to all. His Art & Practice series — Astral Projection, Cabala Magic, Clairvoyance, The Occult, Talismanic Magic — introduces readers to both theory and practice. The Art and Practice of Astral Projection has sold more than 60,000 copies.