The Kabalah
Note on spelling: While there are multiple variations on the English transliteration of the Hebrew word, which has its root in the three Hebrew letters QBL (Qoph - Beth - Lamed), we prefer the above spelling for its simplicity. One might also make note of its numerical significance: it begins with "K" (the eleventh letter of the English alphabet, eleven being symbolic of magic, though the precise Hebrew letter is "Q") and consists of seven letters.
General Introduction to the Kabalah by Colin Low
The Book of Formation (Sepher Yetzirah) Westcott translation
Selections from the Book of Splendor (Sepher Zohar)
Lesson QBL-1 by Fra. Petros Xristos
Lesson QBL-2 by Fra. Petros Xristos
The Four Worlds and Ten Heavens
The Shem Ha-Mephoresh (Seventy-Two Names of Deity)
Light, Chaos and Redemption: The Kabalah of Isaac Luria