This desk is an inexpensive build and especially so once you go shopping for desks. As a bonus, there are free plans to build a plywood bookstand too. Check it out at the link.
With just a few tools and a piece of pine you can build a doggie bookcase like this one.
This is a link to a Google 3D SketchUp drawing for a book stand, which makes a great piece of furniture for the living room or childs room. You will need the SketchUp software to download this drawing and its freely available online.