The romance novel may be a much-maligned genre of fiction, but it's hugely popular, a guilty pleasure of many readers. As a librarian, I spend an inordinate amount of time tracking down romance novels for patrons, and especially tracking down the correct order of the books of a particular author. The correct order matters a great deal, as readers of any fiction genre will agree.
The Romance Writers of America have a website that may provide a huge assist. They provide a list of member authors' websites, most of which list that author's books and series. If you're a romance fan, this could help you organize your reading as well as introducing you to many new authors.