"Twelve-year-old Delphernia Undersea has spent her whole life in the cloister, hidden from sea and sky by a dome of stone and the laws of Blightsend. Outside, the Masters - all boys and men - play music. Inside, the turnaway girls silently, silently make that music into gold. Making shimmers, Mother Nine calls it. But Delphernia can't make shimmer. She would rather sing that stay silent. When a Master who doesn't act like a Master comes to the skydoor,...