Here are entered works on custom bindings of books, irrespective of contents. Works on books that are produced by artists and intended as visual art objects are entered under [Artists' books.] Works on books illustrated with original prints by well known artists and published in limited editions are entered under [Artists' illustrated books.] Works on existing books whose pages have been altered by paint, collage, or other media are entered under [Altered books.] Works on sculpture that mimics the format or structure of a book are entered under [Book objects.]