Book binding is the process of assembling and securing printed pages into a book. It involves attaching a SPINE, COVER, and TITLE to the pages. The SPINE is the back of the book and is usually made of cardboard or paperboard. The COVER is the outermost layer of the book and is usually made of cloth, leather, or paper. Einband is a German term for the decorative material used to COVER the SPINE and boards of a book. A TOOL used in book binding is a sewing frame, which is used to stitch the pages together. Finally, the TITLE is the name of the book that is printed on the SPINE and COVER.