This vintage book deals with the subject of Satanism and demonology, looking in particular at the Black Mass and incubi and succubi. A Black Mass refers to a ritual wherein the Traditional Latin Mass of the Catholic Church is inverted, popularised in the nineteenth century by French literature in such books as Jules Michelet's "Satanism and Witchcraft" and Joris-Karl Huysmans's "L -bas"; while succubi and incubi are demons that prey upon sleeping...