I'm all for bookcases in odd and weird configurations, but this is, perhaps, one of the oddest and yet so utilitarian. I found this at Last Things: Alternatives at the End. Be sure to check the site if you want to plan your own funeral.
The Bookcase Coffin
This is the bookcase coffin. It's two seven-inch-deep boxes hinged together. The shelves are adjustable. When preparing it to be used as a coffin, the shelves are laid on the bottom of the coffin.