Class is entirely intangible, and the way it affects things isn't subject to scientific analysis, and it's not supposed to be real but it's pervasive and powerful. See; just like magic.
Jo WaltonLibraries really are wonderful. They're better than bookshops, even. I mean bookshops make a profit on selling you books, but libraries just sit there lending you books quietly out of the goodness of their hearts.
Jo Walton