After the two coats of glue were dried, I added two pieces of ribbon to the spine for bookmarks. Easy enough.
Once that was dry, I cut some acid free construction paper, and because I couldn't get a piece 22" long, I just folded an end over and glued about an inch to the top and bottom covers of the book and then added back into the press.
To reinforce the spine, I re-purposed a linen napkin and cut it to fit, then put it back in the press. Using a bone knife I made sure this was adhered well to the spine before putting it in the press.
Next up, the cover.