15 Super Smart Ways to Use the IKEA Kallax Bookcase. It requires a little extra woodworking, but this project from IKEA Hackers combines two Expedits with a workspace for an incredibly efficient use of space.
Idea for when we put french door in dining room. Ikea Shelves Into Built-in Bookcases :: I really love this. You could turn any room into a library with this idea. And you don't need ikea for it, either.