Vathek — William Beckford

The novel chronicles the fall from power of the Caliph Vathek (a fictionalised version of the historical Al-Wathiq), who renounces Islam and engages with his mother, Carathis, in a series of licentious and deplorable activities designed to gain him supernatural powers. At the end of the novel, instead of attaining these powers, Vathek descends into a hell ruled by the demon Eblis where he is doomed to wander endlessly and speechlessly. Vathek, the ninth Caliph of the Abassides, ascended to the throne at an early age. He is a majestic figure, terrible in anger (one glance of his flashing eye can make “the wretch on whom it was fixed instantly fall backwards and sometimes expire”), and addicted to the pleasures of the flesh.