The document provides an overview of the horror genre, including its origins in 18th century Gothic literature and folk traditions centered around death, evil, and demons. It describes several common conventions of horror fiction such as isolated rural settings, mysterious plots involving supernatural threats, and protagonists who must confront the evil entity. Examples from Stephen King's novel "Salem's Lot" illustrate conventions like the gloomy atmosphere, isolated town, and buildup of unease and fear in both characters and readers.