a book in which a love story is the central focus of the book, and that has an emotionally satisfying ending that results from a positive resolution to the central love story

a fine story

an entirely different genre - it has its roots in Grimm's fairy tales and hence the stories tend to be very similar because the themes of Grimm's fairy tales are similar

a novel from the genre currently known as romance

a story in which, in spite of all obstacles, the hero and heroine end up together

A Romance novel is a Literary genre developed in the Western culture, mainly in the English-speaking countries.