Being the DIY mom, I thought, I need to learn book bindery now. Then, I remembered the many Kindle covers I've made using duct-tape, and it became clear that I found a more simple approach. Also, using duct-tape, something that I already had, made it low to no cost to fix. With larger board books, like the picture featured, duct-tape makes sense. For smaller, more delicate paper books, washi masking tape - made of many different patterns and colors - will be perfect to reinforce loose pages and binding.