The use case diagram for book publishing presents the interactions between various actors involved in the book publishing process. The main actors include the author, editor, publisher, and reader. The author submits manuscripts to be edited by the editor. It is upon the publisher to approve, distribute, and promote books. Furthermore, once published; books can be bought and read by different readers around the world. This diagram serves as a visual representation of all roles as well as processes from manuscript submission down to the point of purchase by readers.