The Arcane Archives contain literally hundreds of documents and there is also some really interesting analytical artwork on the Tree of Light. Just to list a few areas and authors, you will find there:
Egyptian Myth Hermetic Kabbalah Alchemy John Dee Rosicrucian Tarot Aleister Crowley Occult Fiction Yoga Helena P. Blavatsky Theosophy Eliphas Levi Paschal Beverly Randolph Golden Dawn W.W. Westcott S.L. MacGregor Mathers A.E. Waite William Butler Yeats Dion Fortune J.F.C. Fuller Frater Achad Austin Osman Spare Benjamin Rowe Witchcraft