Walls tumble down. They start off by keeping things in, or out – depending on where you stand, or who you are – north/south, rich/poor, East/West, royal/peasant and so on. They end up, when they come tumbling down, letting everything in, or out, depending on whether they sequestered or excluded. When walls fall, things always get better; from Jericho to Hadrian’s Wall, to the walls of the Bastille in Paris to the Berlin Wall; old walls protect old orders. In the world of writing and publishing