2. Usually, there is only one cover, "the seal of a certain" or "a certain", or only a first name, no surname, or a pen name. In short, there is often only one cover. There are also people whose surnames are stamped and whose names are stamped, but very few.
3. Some works with a certain level will use leisure chapters, that is, chapters that are not used to identify the author, but to decorate the layout.