. . "Now I can be sure that all the books on nineteen shelves have been cataloged, and all the books on the remaining shelves have not yet been entered.This has been a rather backwards way of organizing a library.So, if anyone decides to catalog their books, here is an idea, for what it is worth - mark them as you enter them in the catalog, and you will not have to guess later, and search, to see if the wo" . .