Place infested books into zip-closure plastic bags. Close the bags most of the way, and squeeze the air out. Seal the bags fully.
Put the sealed bags into the freezer. Leave them there for three days.
Take the bags out of the freezer and remove the books. If the books are delicate or seriously damaged by the silverfish, turn the pages carefully and pick out the dead insects. If they books are sturdy enough, hold them open upside-down and shake them gently to dislodge the silverfish.
Store the books in airtight bags or containers. Use a dehumidifier in the storage area to reduce the likelihood of another infestation.