The cover of a book is a means of visual communication through which information, ideas and messages are transmitted and it is usually the first contact of the viewer/reader with the book. The inability of letters, words, and linguistic language to express a thought or idea completely clearly, as well as the inability of an image to represent a reality or fiction quite clearly, is always present. Creation is a process of becoming and the results of the creative process are never its completion, but rather its temporary cessation. This essential incompleteness and (un)accomplishment often reveals the result of the creative process as something both real and imaginary, something prepared and open for further preparation. The cover of the book is no exception. It is a "dream in a dream" in which one dream is more "real" and the other more "fictional" or they are equally real and equally unreal at the same time. The metric of "reality" or "fiction" of a book's cover is perhaps best manifested and measured through intermediality - the cover is, in fact, "real" if it is made according to the text of the book, or "fictional" if it is not made according to the text of the book. For the viewer/reader, the cover of the book changes after reading, because once read the book changes the viewer's/reader's experience of the cover, and the cover of the book "makes visible" the shortcomings, errors and redundancies. There is no unified process for making a book cover. The time required to create a book cover cannot be determined exactly. The cover of a book affects book sales. The cover of the book is the "advertising window" of the book.