If you have some old and used briefcase you can made an interesting desk design like in this photo.The Leather briefcase desk is designed by Maarten de Ceulaer company, so I guess you could make such a desk if your name was Maarten de Ceulaer.
I really like the idea of using leather briefcases put together in a pile so as to make up a modern and cool desk. But I seriously doubt this would be a very good idea because leather briefcases are not the proper surface for writing documents because it is soft and also will cost you quite a good sum of money since leather is expensive. Well, this leather briefcase desk is only a model and it is designed for the sake of designing.
You can use it, of course, but only after some serious adjustments: the briefcases on top must be glued together and their surface replaced with a harder one, while the handles of all the briefcases must be used to open up drawers. So it’s a serious work, so I’d rather buy a normal desk instead. But this is a masterpiece in terms of design.