Amazon.com (ISBN 0892817240, Paperback)

The Secret Doctrine of the Kabbalah is the second book by Dr. Leonora Leet (with two more planned) to result from a project begun in 1978 with the accidental discovery of what she believes to be the ultimate source of the Kabbalistic Tree of Life diagram. Her first text, Renewing the Covenant: A Kabbalistic Guide to Jewish Spirituality, should be perused before attempting to decipher this brilliant but dense treatise. Not for the casual or merely curious reader, Leet's book expounds on such theoretical subjects as the Tetragrammaton, the Covenant of Number, the sacred science of sound and spiritual practice, Kabbalistic geometry, and cosmic genesis. She goes on to synthesize sacred science and Kabbalistic cosmology with quantum physics. If your IQ is at least comparable to your body weight, and your bent is unlocking the doors of the universe through geometry, this excruciatingly well-researched tome may get you in the front gate. --P. Randall Cohan