The Astral Plane

Reference to the astral plane, or K maloka as it is called in Sanskrit, has frequently been made by Theosophical writers, and a good deal of information on the subject of this realm of nature is to be found scattered here and there in our books; but there is not, so far as I am aware, any single volume to which one can turn for a complete summary of the facts at present known to us about this interesting region.