Jay Walker, inventor and entrepreneur has one of the finest private libraries in the world.
It's one of the most beautiful libraries I've ever seen pictures of, whether public, private or national library. Can you tell I'm jealous much? Wouldn't it be wonderful to get locked in for a few days, or weeks, of uninterrupted knowledge consumption?
The video below is from a TED talk, he's a bit of show off, but fair enough with a library like that.