Category romances (also known as series romances) are a special type all their own. These are the books put out in monthly "lines," such as Silhouette Special Edition and Harlequin American Romances. The major publishers are Harlequin and Silhouette, although some other publishers have dabbled in this field. All but one of the lines are contemporary. Category romances are shorter than the typical contemporary romance. Like other types of romances, they can be dramatic, humorous, sexy, or mysterious. Before submitting to one of the lines, you must read their guidelines and read the books within that line. Many writers start out writing category romance and go on to longer "single-title" romances. (A single-title book is a romance that is not part of a series.)