William G. Gray is one of the most highly-regarded British ritual magicians of the twentieth century, and his first book, The Ladder of Lights is widely considered to be a classic work on the application of kabbalistic principles in the Western Mystery tradition. In this clear overview, Gray explains the magical significance of the Tree of Life, how each of the ten sephirah appears in each of the four worlds; the sephiroth in relation to the planetary powers. This is not a practice-oriented work, but  is one of he most important introductions to understanding kabbalah from the perspective of ritual magic in the Western Mysteries. 

York Beach: Samuel Weiser, Inc., 1981. Paperback, 240 pages. New.

The Ladder of Lights - William G. Gray