Franz Bardon avec The Key to the True Kabbalah
The third book reveals the deepest secrets of the mystic kabbalistic and magical formulas using Theurgy, the cosmological, divine science of letters. Part I: the Theory of the kabbalah, including the esoterics of letters, mantras, tantras, the Tetragrammaton, sorcerers' formulas. Part II: Theurgical Practice in ten steps, the ten kabbalistic keys and their practice. Part III: the Practice of Formula Magic: use of the keys, and the use of Divine names and beings.