In print since 1927, this study of our subtle body is based on the works of Theosophical authors and noted clairvoyants, including H. P. Blavatsky, C. W. Leadbeater, and Annie Besant, and is one of a series of 5 books dealing with the bodies of Man and his role in the Scheme of Evolution. The astral body is the vehicle of feelings and emotions seen by clairvoyants as an aura of flashing colours.

Arthur Edward Powell (1882-1969), was a Theosophist whose books were published beginning in the early 1900s. He studied the major esoteric works of Helena Blavatsky, Charles Webster Leadbeater and Annie Besant.