Ladder Bookshelf. That's a neat idea. I would probably need a lot of these because I own a lot of books.
DIY Dining Room Open Shelving - The Wood Grain Cottage. Would be perfect with just the top few and slide a desk in there. I have so many books and nic naks!
Industrial Tripod Bookcase - Shelving Units and Libraries | Interiors Online - Furniture Online & Decorating Accessories