A novelist is an author or writer of novels. Often novelists also write in other genres of both fiction and non-fiction, but the term "novelist" is applied when referring to their work on the novel genre. Some novelists are professional novelists, or novelists who make a living from writing fiction, while others aspire to support themselves in this way or write novels as an avocation. Most novelists struggle when breaching the publication barrier, finding it hard to publish their debut novel. Once published, authors often continue to be published; however, very few novelists gain literary celebrity or considerable income from their work.