Glue Strips are used to repair textbooks, paper back, and hard-back books. Each strip will repair from 3-5 books, depending on the spine width/length. Glue strips are measured and cut with ordinary scissors to fit just short of the length of your spine. Don’t throw away those scraps, no matter how small they may seem! Scraps of your glue strips are saved and then used to repair smaller books, or can be combined to repair larger books. This is where your average cost of 25¢ per book comes in! Glue strips are sold in packs of 50 strips per pack.