This is the first corrected edition of The Fourth Book of Occult Philosophy by the noted Renaissance magician Henry Cornelius Agrippa. A student under the tutelage of Johann Trithemius who later took on the role of mentor to the famous Johann Wierus, Agrippa has proven to be one of the most influential occultists in history. Professor Marc Huys has corrected, translated and annotated the Greek provided in the original editions of The Fourth Book and provided their sources for the modern reader. As has become the custom since the first English edition of this work in 1655, this volume includes the Heptameron or Magical Elements of Peter de Abano, the twelfth century esotericist. The artwork from the original edition has been restored for inclusion in this volume.