Why is the spine of my book not glued? allenrbird March 12, 2020 15:21 Updated We intentionally apply less glue and tape at the spine area. This allows the photobook to open, close, and stretch without ripping apart. So therefore, this is NOT a defect, but a mandatory part of our book's design that serves a critical function. Related articles What does your end paper and fly sheet consist of? What is the difference between the Layflat Photo Book and the Flush Mount Album? Why are the pages of my Layflat Photo Book not laying flat? Can I use other album maker software to design my book? What is the difference between Lustre and Metallic photo paper?