It is very important to organize library contents because libraries are meant to be able to be used to look things up. If things are not in order than people will just tear through everything to find something.
no, because you might ruin the books
There were no public libraries, although those who were very rich may have had private libraries - this was a vast room with a collection of books and usually somewhere quiet to study or read them.
17 million
depends what library but most do sell books. Most libraries have an ongoing process of "weeding" by which they remove books that no longer fit their needs, in order to make space for new materials. These are often sold to the public. Also, libraries often receive donations that contain books they do not need, or already have; by agreement with the donor, they will sell those as well. Some libraries sell such books on an ongoing basis, but many have an annual book sale in order to increase publicity.
because libraries are places built for people to borrow or read books
Yes, as most books are out of print at any given time. Larger public libraries and all academic and scientific libraries have many older books. The same applies to specialist libraries.
They both have books
Libraries is the plural form of library.
We have libraries so that people can read books and extend their knowledge.
A Dewey Decimal Code is commonly used in libraries as a method of classifying books. It is merely one popular code for this atsk - I think the Library of Congress uses a different system.
It helps certain libraries check out books using a barcode on the back of the book. It is a faster and quicker way for librarians to check out books .
The plural of library is libraries. As in "libraries have lots of books".
At book stores or libraries.
Books.
If there are no libraries in your area, there may be a traveling book van that can bring you books. You can also go to a bookstore, or read e-books.
Most public libraries support banned books.