Why is the spine of my book not glued? Jennifer September 20, 2023 23:36 Updated We intentionally apply less glue and tape at the spine area. This allows the photobook to open, close, and stretch without ripping. So therefore, this is NOT a defect, but a mandatory part of our book's design that serves a critical function. Related articles What is the difference between a Hard Cover and a Paper Cover? Can I get a price estimate for my project? Do you print nudity or boudoir photobooks? What are your End Paper and Fly Sheet options? Photobooks Comparison