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.
The plural of library is libraries. As in "libraries have lots of books".
Books.
At book stores or libraries.
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.
Libraries sometimes colour-code their books so that they are easier to identify and find by library users.
Most public libraries support banned books.
Ella V. Aldrich has written: 'Using theological books and libraries' 'Using books and libraries'
Libraries don't typically sell books that are currently in the collection, but many public libraries will have periodic sales of books that have been weeded from the collection. Other types of libraries, such as academic libraries, rarely (if ever) sell weeded items.