You probably don't think about it - I hadn't given it more than cursory consideration - but there is a lot that goes into a book beyond the simple writing of the story. Front and back covers have to be designed. ISBNs have to be purchased. Copyrights have to be obtained. Fonts have to be chosen, and sizes: page sizes, font sizes, margin sizes. Pages have to be numbered, prefaces and acknowledgements have to be written...I could go on.