can you make the next level a modded dimension or something where the ender dragon can hatch and then the next few levels grows up and turns into something to either kill or get more dragons from plz n_n (: epic game very short
only thing you can craft from those bookshelves is library buildings. so you should have enough. if you post a screenshot, i can better see what you need to do.
yeah, we're going to add new stuff like that in the next update