if we are dealing with sheer volume. If its just a matter of pages, and so many pages for so many dollars. If we are faced with an issue of "too many chips to list", then there are only so many choices. Either something has to be dropped, or we have more pages. If more pages, then a choice of all in one book, two or three. If its a matter of $$$ per volume, then the LE's can be sold as a seperate volume.