Perfect binding is a form of adhesive binding or hot glue binding. This binding method is sometimes called a "soft cover," which is similar to a paperback book or novel. It is excellent for books, corporate reports, manuals, brochures, and annual reports. The advantages are versatile, printable spine, longevity, overall look and visual appeal. A printed spine requires a minimum of about 50-60 pages to allow room for the printing. Minimum pages to perfect bind are about 24.