Many elements of the genre have been transplanted into fantasy worlds, particularly those of fantasy of manners and alternate history. The science fiction writer Andre Norton first reached success with a 1934 Ruritanian novel, "The Prince Commands". Although "Ruritania" originally referred to a "contemporary" country, the idea has been adapted for use in historical fiction. A subgenre of this is historical romance, such as Jennifer Blake's "Royal Seduction" and its sequel "Royal Passion"; both are set in the nineteenth century and feature Prince Rolfe (later King) and his son Prince Roderic respectively, of the fictional Balkan country of Ruthenia. (Ruthenia is a genuine geographic name, identifying an area of eastern Europe somewhat to the north of the Balkan peninsula, in the Carpathian mountains, but is not an independent country.)