It's a book about a glass world, one where the people are used to living delicate lives because of their fragile surroundings, but a pair of friends show up, not used to this culture at all, so they have to adjust, but aren't doing so well. However, they are the ones prophesied to save that world, so they have to learn to live that way as well. It looked interesting, so I thought it would be a good read.
[Then a tilt of her head.]</small>
Oh, are you talking about those robots flying around today?