“It's supposed to be very beautiful, the Citadel,' Oak says. 'It is beautiful, Wren?'

When the light went through the ice of the castle, it made rainbows that danced along its cold halls. You could almost see through the walls, as though the whole place was one large, cloudy window. When I was brought to it for the first time, I thought it was like living inside a sparkling diamond.

'It's not,' I say. 'It's an ugly place.”