Romance novels are a genre of fiction that focuses on the development of a romantic relationship between two characters. These novels often follow a formulaic structure, with a central couple who experience obstacles to their love, eventually leading to a happy ending as they overcome these challenges and declare their love for each other. Romance novels can be set in any time period or location, but are typically focused on the emotional relationship between the characters rather than plot-driven action or suspense. They often explore themes of love, passion, and commitment, and can range from sweet and sentimental to steamy and erotic.