I made a book box! :D
It was easy. But also messy. There were paper shavings all over my desk. The tutorial I followed said to drill the corners, and I wonder if that would have made it a tidier job, but it's not so bad anyway if you have a bin beside you.
The principle is simple - you're basically making papier-mâché out of the pages, then carving up the bulk. It only took a few hours + 30 minutes of drying time every time I applied glue. One could easily start and finish a project like this in an afternoon.
Here's the guide I used, if anyone else wants to try: