If you’re an avid reader, you know the sadness that comes when a beloved book falls apart. But if you’ve spent much time in libraries, you are likely familiar with the heavier “library binding” style of book meant to last hundreds of years. Did you know there’s a NISO standard for library book binding (ANSI/NISO/LBC Z39.78-2000)? It’s some 39 pages long, including descriptions of paper composition, cover board materials, adhesives, instructions for sewing (depending on the thickness of the book), and much more. If you’re not Todd Carpenter, you may not want to read through the entire standard, but you may enjoy the video below that takes a fun look at just what it takes for a book to be “library worthy”.