: To summon the angels, the practitioner must place the Almadel on four candles. The color of the wax must match the "altitude" of the angels being called—for instance, white wax for the first altitude, or red for the second. The Divine Messengers
To understand why a "Complete Books I-V" edition is necessary, one must look at the specific knowledge contained within each volume: I. Ars Goetia (The Art of Witchcraft)
The grimoire is divided into these five parts, which detail the summoning of spirits, angels, and demons: