If the book doesn’t stay open on its own, make sure to weigh down the pages with a paperweight. This way the book won’t start closing before you’re done inserting the loose page. [1] X Research source
Do not glue multiple loose pages onto one another as this will not be stable over time. You can purchase archival glues from craft stores or an archival supplier.
To prevent any glue from oozing out, you can put a piece of wax paper along the page to soak up any escaping glue. This way your pages won’t glue together. [2] X Research source
You should be selective with what kind of tape you use. An archival document repair tape will be safest for your book. [6] X Research source
If using a stiff folder, use the folder’s edge to smooth the tape down.
If the cover of your book is extremely loose, but not fully detached, you can gently peel it away from the textblock, the part of the book that’s contained within the cover. [8] X Research source
You can place wax paper between the cover and the first and last pages of the book to prevent any oozing of glue. [10] X Research source
The glue binding of thick paperbacks, in particular, are notorious for partially breaking while you’re reading.
You can use a small brush if you’d like to more evenly apply the glue.
Do not ever use water with your sponge. This will cause permanent damage to your book.
Ink marks cannot be removed.