The Cozy Mystery (a.k.a. the traditional British mystery)
Among the many sub-genres of mysteries, one of the most popular is the cozy mystery. The mystery website cluelass.com defines a cozy as a traditional style of mystery that usually includes an amateur sleuth or eccentric professional solving a crime in a country house or quiet neighborhood, with very little description of violence or sex. There is a limited roster of suspects, all part of the victim's social circle, and a mildly romantic sub-plot.