A Complete System of Occult Philosophy Books 1 and 2: 

A Rare 19th Century Grimoire Spell Book on Ceremonial Magick

The Magus by Francis Barrett is one of the primary sources for the study of the occult and ceremonial magick, and for a long time was one of the rarest and most sought after grimoire spell book in the 19th century. Few people, even today, know that The Magus is a compilation, almost entirely consisting of selections from Cornelius Agrippa's Three Books of Occult Philosophy, the Fourth Book of Occult Philosophy attributed to Agrippa and the Robert Turner's 1655 translation of the Heptameron of Peter of Abano.