Place a piece of waxpaper between each endsheet so that the moisture from the glue won't affect your inner pages. Close the covers and place the heavy books or weights on top. This will ensure that the glue sets evenly, as well prevent buckling and bulging between the sheets (keep the wax paper in place to prevent wayward sticking). Set the stack aside to dry for a few hours, or, if you can bear to wait, preferably overnight. Refrain from peeking at how cool your hardback is until the glue is dry! It's tough, but if you open the book before it's dry, it could cause the endsheets to tear while they're still moist.