No
Try going to Wal-Mart and getting some Goo Gone.
It depends on whether the change is physical or chemical. If it is a chemical change, it will be an irreversible change. An example of this, is if you pour an acidic chemical onto the paper, you will...
paint a thin coat of modge podge (elmer's glue and water mixed together to form a sealant) over the paper label, let dry.
it means the book cover is not hard