This image has been making the rounds recently, striking awe into the hearts of all who see it. Sadly, this library isn't actually in existence, but it gives you some idea of how architects imagine the libraries of tomorrow. This image is the work of architects Olivier Charles, Armel Neouze and Jacques Gelez, who entered it in the competition to design the addition to the Stockholm Public Library. (This was the winning design - although the project has been put on hold due to soaring costs.)
Absolutely gorgeous. If you're interested, you can read more about how the trio created their design here.