Kabbalah
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Sefer Yetzirah
Heikhalot Rabbati
Sefer HaBahir
Zohar
Ramak
Ramchal
Arizal and Chaim Vital
Baal HaSulam
Gan Naul (Abulafia)
Get HaShemot
Ohr HaSekhel
Other Kabbalah Works
Sefer HaCheshek
VeZot LiYehuda