The present work is the only non-fiction book Sax Rohmer wrote. He was thirty when it was published, and it shows that by then he was a profound student of things occult. In this books he comes to the conclusion, in a very sane and reflective way, that the occult contains a great deal of truth which we can find only by the occult path. Sorcery is for Sax Rohmer a synonym for magic; he believes that the great magical tradition comes to us from Egypt; and he believes that this magic, rightly understood and practiced, brings about mental and physical results which are very valuable for the human race.