A former library book, generally containing library acquisition and ownership stamped markings, and other typical indications of the library's use.

Books legitimately released from institutional libraries such as a school library, public library, historical society, university, etc. Also named "ex-lib" will be lower in resale value due to library card pockets, rubber stamp identification information on spine or title pages, catalog numbers inked or stamped on inside or outside of book, call tags, bookplates, and normal to excessive wear and tear to the book itself due to the library lending system. When a listing states ex-library be aware of the condition and reach out to the bookseller for photos or more information concerning the book.

example of an ex-library book