Treatise on Cosmic Fire, by Alice A. Bailey (used)

A Treatise on Cosmic Fire (1925) is the third of Alice Bailey's roughly twenty-five books of theosophical/esoteric writing, which she said were "telepathically dictated" to her by a spiritual teacher she called "the Tibetan." Running to over 1,300 pages, it lays out an esoteric cosmology describing cosmic processes reproduced at every scale of existence "from universe to atom," aimed at serious students of occult philosophy.