Third edition of this seminal work, from which many 'Mind-Body-Spirit' books, written since, have been derived.

Original blue cloth.  A hand written note re the owner of the book meeting the author, and about the word 'occult', is paper-clipped to the fep. There is a newpaper clipping (1970) with a hand written note, refering to the moon and humanity. Size 22cm x 14cm x 1cm. A good clean reading copy, and a fascinating insight into 1930s scientific and esoteric thinking.