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Interlibrary loan (ILL) is the process through which you can borrow books, articles, and other materials from a library you are not affiliated with. For instance, if the Columbia College Chicago Library does not have a copy of a book you need you can request that book from a another library, like SAIC or UIC.
At Columbia, we primarily use two systems for ILL:
I-Share for books (sorry, ebooks are not available for lending through ILL)