Perfect Binding gives your booklets a more finished, refined look. With this binding method, the pages and cover are glued together at the spine with a strong, yet flexible, thermal glue. Other binding types include saddle stitching, plastic coil, and wire-o. Perfect-bound books are a custom project and you would need to contact our Support Team to assist in pricing and placing this order. Please make sure to provide as much information as possible for us to be able to get back to you quickly with a detailed response. Contact Support Team at Support@4over4.com or you can use the Custom Project page to submit your request https://www.4over4.com/custom-project