This is the Walstrom House by California-based architect, John Lautner. Even though I would not classify this as a library per se, I find the design of the bookshelves in the open area floorplan as a unique twist to a reading space.
There are more pics of grey and yellow spaces where this one came from. I really like the idea of using grey and yellow for a bathroom or a bedroom. The grey makes the space look larger while the yellow warms it up and gives it a happy, cozy feel.