777 and Other Kabbalistic Writings of Aleister Crowley is a reference collection of Crowley's major texts on Hermetic Kabbalah. It includes gematria (on numerical symbolism), the famous Liber 777 tables of magical correspondences (linking the Tree of Life to the Tarot, planets, gods, colors, and other symbols), and Sefer Sefirot (a dictionary of Hebrew words by numerical value).