There is the old saying that just about every story can be summed up as "a stranger came to town." There is a book by Christopher Booker, where he claims there are really just seven types of stories.
Existe el viejo refrán de que sobre cada historia puede resumirse como "un extraño vino a la ciudad". Hay un libro de Christopher Booker, donde afirma que en realidad hay solo 7 tipos de historias.