This satanic book consists mainly of two writings by Ecclesia Luciferi: Come Evil Spirit and Apostolus Satanae. The book Come Evil Spirit is a brief presentation and introduction to the godless theology of the Satanic System Ecclesia Luciferi. It was created in order to present the Satanic Sect Ecclesia Luciferi itself in the most brief and concise way possible and to present the articles of disbelief of this system. An understanding of the godless theology of Ecclesia Luciferi, or the Mystery of Godlessness, is essential for anyone who expresses a willingness to identify with the philosophy of this satanic sect. A true understanding of the theses contained in the chapter Satanic Restoration leading to a deep inner conviction of their rationality and of the true effects of the inner satanic transformation (sin against the Holy Spirit) should lead to the inner sacrament of Baptism with an Evil Spirit, which is dealt with in the chapter Pact with Satan. After the sacrament of Baptism with an Evil Spirit, the Satanist Ecclesia Luciferi, i.e. the person who has been restored to the state of original godlessness will find himself on the path leading to the attainment of the self-awareness of the Light-Bearer and to eternity among the dead stars.