Quotes from Marquis de Sade's books, and about them
The House of the Spirits on La Philosophie dans le boudoir: “Afterward he was unable to fall back to sleep, and spent the rest of the night reading La Philosophie dans le boudoir, of the Marquis de Sade, while Blanca sighed through her dreams that it was marvelous to be married to an intellectual.”
The Magus on Les Infortunes de la Vertu: “(epigraph) 'Un débauché de profession est rarement un homme pitoyable.' — De Sade, Les Infortunes de la Vertu”
Babel Tower on The 120 Days of Sodom: “Jude's 'Tour Bruyarde' is called 'plagiarised from the terrible Marquis's Château de Silling in The 120 Days of Sodom.'”