Icarus and Velvet (Abridged)

'We increased the bounty on angels today,' my father said. He was shielding his eyes as he squinted up through the ground window at the red, dying sun. 'Five thousand pecs for a healthy woman or child...' Humanity has splintered. Over millennia, the Avians of the Clifflands have learned to fly with wings of sky metal. The Subterraneans venture to the surface only to farm in vast glass domes. Between them lies the boundless and savage Wilderness. Suspicion and hostility between their cities ...