Demonology has often been studied through the distorted prism of Christian theologians, who water down their works with counterproductive moral considerations for the occultist who wishes to benefit from the full potential of Black Magic. De Invocatione Daemonum contains a basic system of working inspired by several grimoires such as The Grand Grimoire, The Grimorium Verum and The Lesser Key Of Solomon, adapted for the Orthodox Devil Worshipper. Included is a lot of additional information regarding Satanic rituals, death spells, black masses and the Left Hand Path in general, making it the perfect reference book for the true Satanist.