Marquis de Sade 
Justine [EPUB ebook] 

Justine, aged twelve sets off to make her way in France. The book follows her until age 26, in her quest for virtue. She is presented with sexual lessons, hidden under a virtuous mask. The unfortunate situations include: the time when she seeks refuge and confession in a monastery, but is forced to become a sex-slave to the monks, who subject her to countless orgies, rapes, and similar rigours.