There have been many books over the eras that promise other worldly powers to those that read it.
The oldest of the texts found in The Lesser Keys Of Solomon, promises a silver tongue, a ‘perfect memory’, and wisdom. As the book has gone through numerous and unauthorized revisions through the ages, it’s hard to quantify its success. Also, the original texts were written in mash up of ancient Hebrew, Greek, and Latin. King Solomon himself used the original content of Ars Notoria to become as wise, compassionate and clever as he was made to be famous.
Another famous user of the Ars Notoria was John of Morigny, a fourteenth century monk When he tried to achieve academic mastery, he became afflicted with demonoid visions . He went on to create his own grimoire, Libor Visonum. He believed that the Ars Notoria worked but came at too high a price…
By: Jeff Wilson on thespiritscience.net