I learned a new structure this past week called the German Lap Component. It is an entirely paper covered book. The text block of this binding is traditionally very bulky and the paper is usually ugly. My classmates and I took some time to make our own lovely icky paper. Throw-up browns and dirty green colors are the best. The edges of the book are also painted and/or decorated.
The neat thing about the internal structure is that the spine strip and "bonnet", as we call it in class (extended lining of spine strip), are made of one solid piece of handmade paper. The paper is moistened and shaped onto the book which creates a very sturdy, snug spine.
Below are my two bulky books. Doesn't matter what they look like to me, they are healthy and strong, which is what truly matters.