This is the first English translation of one of the most important, interesting, and comprehensive discussions of the occult sciences ever published. It deals not only with magic in all its forms, from the manipulation of angelic and demonic powers to straightforward conjuring and illusion, but also with witchcraft, alchemy, astrology, divination, prophecy, and possession by evil spirits. Nothing so panoramic had ever appeared before, and for the next one hundred and fifty years Investigations into Magic was the indispensable reference work on the subject.