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.
Sunroom almost exactly. either this floor or repeat entryway floor. All metal windows and doors throughout, simple ceiling, chandelier, fireplace punches through from living room. (some thick metal areas around window/door frames)