The Secret Doctrine of the Rosicrucians by Magus Incognito

Writing as Magus Incognito, William Walker Atkinson reintroduces a new generation of readers to the Rosicrucian ideals, as well as to a myriad of connections between occult concepts as varied as alchemy, reincarnation, the astral plane, auras, Eastern and Western mysticism, and the "evolution of mankind" among seven esoteric versions of planets in our solar system.