Marquis de Sade 
120 Days of Sodom [EPUB ebook] 

The 120 Days of Sodom, also known as the School of Libertinism, is described by the author as the most impure tale that has ever been told since our world began. The novel tells the story of four wealthy male libertines who resolve to experience the ultimate sexual gratification in orgies. To do this, they seal themselves away for four months in an inaccessible castle with a harem of 46 victims, mostly young male and female teenagers and engage four female brothel keepers to tell the stories of their lives and adventures.