I agree there should be a "coffee table" book like this. I won't be the one trying to even to begin getting the licenses. Many of the museums, galleries, auction houses, etc. I've taken these from were very generous in allowing use, others not so much and I had to pull a few computer tricks to get them here.
I'm glad you're enjoying the collection and I hope there is some way to preserve it here after I've exhausted my last corner of the world.