Pseudomonarchia Daemonum - French translation of the original work, enhanced with a directory of the 666 Spirits or Demons

Summary of the work
"When the Spirit is present, you must know its name and its supreme charge.

You must have fasted and been pure from all defilement for three, or better still, four days.

Thus, the spirit will obey you more. Then draw a circle and summon the spirit by concentrating.

You must first hold a ring in your hand, before reciting blessings in your name and in the names of your companions.

If you follow this advice, and strictly observe what is announced to you, no spirit will be able to seize you and you will achieve your objective..."

Jean Wier, Pseudomonarchia Daemonum
(Excerpt from "Prædictorum Spirituum")