The first edition of the work was published in 1921 and marked a significant event in publishing history, as no one had dared until then to offer the general reading public a manual related to the occult sciences. Since then, its circulation has never decreased, and each new edition has been enriched with new elements and examples of the application of occult science among various peoples. Thus, the latest edition constitutes a new work, radically modified and supplemented with the latest findings of scientific research, a work that addresses all circles of readers and meets the demands of the most cultivated and informed reader on the subject. We are confident that the general reading public will welcome it with the same enthusiasm as all the other works of the Author in Europe and Greece.