The Library started out as an actual branch of the Seattle Public Library. When the patrons started disappearing, though, it was sold off. The new owners purchased the whole place, books and all, and opened up a coffee shop inside. The coffee is actual coffee, not just some soy based blend with attempts at resembling consumable liquid.
But don't go in expecting just some standard Soybux, though. It's upscale, semi-exclusive, and right around the "if you have to ask, you don't belong" category. (The reads are choice, though.)