Abstract: In the .[.higher priced grade of books, which for example are known generally as the "hard copies" as distinguished from the more economically priced.]. so-called "paper backs", it is customary to protect the books .[.by.]. .Iadd.with .Iaddend.A so-called .[.dust shield or.]. protective cover. These protective covers are generally highly colored and carry a pictorial image of the author, or of some primary incident in the story. When it is necessary to put down the book without finishing reading it in one sitting, it is desirable to have a book marker so that one's place can be quickly and easily found so that the story can be continued without regression. Frequently a portion of a page of newspaper or magazine is torn off to provide a small book marker. By the present invention a narrow perforated .[.edge.]. .Iadd.strip .Iaddend.of the .[.fold under flap of the book.]. .Iadd.protective .Iaddend.cover may be torn off from the .[. dust shield or.]. .Iadd.protective .Iaddend.