“To understand the grimoires within their own context, we must not look at them through the eyes of twenty-first century readers with modern sensibilities. We must examine them with the eyes of the medieval magician, who lived in a world much harsher than our own: famine, epidemic illness, religious persecution, and warfare often meant that human life was cheap. As a result, the magic employed by medieval mages to protect home and hearth was a very serious business and not for the faint of heart.”