I love books. I love design. Thus, I love bookcase design.
In my mind, a bookcase is an integral of any room - here is a perfect example of how a bookcase is not just an addition to a room, but rather, a necessary part of its very structure:
The only thing that could make this wall o' books better is if the window were even larger [perhaps a full bay window?] and accompanied by a plush cusion - the perfect place to curl up and read after choosing one of the hundreds of books that border the little nook.