In today's market, it's difficult to publish a novella. Except for electronic romance and sci-fi/fantasy tales, novellas are a difficult commercial sell, even if you bundle two or three of them or include your novella in a short story collection (story collections seldom sell). Even if you can find a publisher who is interested in buying your novella, they likely will not pay much for it. However, if you write what you know, your audience will appreciate stories about people like them. For example, if you are a woman, and your tale is about women, there are many women readers who would love to buy your novella. Novellas are usually between 7,500 and 20,000 words long. Short stories are available in a variety of lengths; most fall between 1,000 and 6,000 words. Novels are longer than screenplays or shorts films. Sometimes a novel is called a "book" instead of a "novel". A book can be a single volume or may be published in several parts. Some books are also divided into chapters or sections. A book report is written by students about a book they have read for school or class purposes. Book reports are often done as essays. They may be 15 pages long or more. Book reviews are written by journalists for magazines, newspapers, or websites. They are usually one page long or less. Film reviews appear in publications that cover movies.