5th 2004 286pp Llewellyn trade paperback. VG+.
 
Originally titled Tetragrammaton, Tyson shows how IHVH, the four Hebrew letters in the lost name of God, hold the key that unlocks the meaning behind astrological symbolism, the Tarot, the kabbalah, the mysteries of the Old Testament and the Book of Revelation, divinatory systems such as the I Ching and medieval geomancy, the Enochian magic of John Dee, and modern ritual magic.