This article focuses on the highly specific genre of 18th century French erotic “convent novels,” part of the larger genre of libertine literature. Within the field of libertine novels, clerical themes—especially those relating to nuns and convents—are more common than references to prostitution and brothels. Such works combine the double-taboo of sex and religion. And the focus on convents brings in a third transgressive element: lesbianism. The author argues that there are enough similarities of theme and content to declare the “libertine convent novel” an identifiable genre.