Paper Dragons are not truly living creatures. They are pieces of parchment enchanted by magic, and as such, are very vulnerable to fire. However, they behave almost like dragons. The only place where their behavior differs is breeding: paper dragons cannot breed.
Lady Of The House Of Books is the second paper dragon that Lady Of Words Of Power created, because the white dragon was unwilling to erase any more of her old spells and notes from her first paper, Lord Of All Knowledge. Lady Of The House Of Books is also in charge of maintaining the weyr's ever-growing library of scrolls and leaflets, although some of the dragons suspect that she's pasting some of the pages into her wings to make herself appear larger.