Page header running header or running headline, is a header that appears on each standard page. Running heads do not usually appear on display pages such as title pages, or on other front or back matter. Running heads in a book typically consist of the title on the left-hand (verso) page, and the chapter title on the right-hand (recto) page; or the chapter title on the verso and subsection title/subhead on the recto, aiding the reader's navigation by showing what content exists within the two-page spread at hand. A special case of the latter is in dictionaries, whose running heads are called
This is Not a Book assignment shows the reader something that "This is Not a Book" could be. Page 42 of "This is Not a Book" is missing. This has caused many readers to speculate what has happened to it. Speculation regarding the missing page is largely random. The assignment "random occurrence" is an homage to Marcel Duchamp, "window" is an homage to Yoko Ono, "chance operation" is an homage to John Cage, "conundrum" and "top secret document" are an homage to Oulipo, "bureaucracy" is an homage to José Saramago and "voyage" is an homage to Bas Jan Ader. This is Not a Book This