Golden Flight. The Keeper's Records of Revolution

Concluding S. K. Ali's powerful duology, The Keeper's Records of Revolution, Golden Flight returns to a divided world with war on the horizon. How difficult is it to crash the party of the decade? Literally crash it? The Golden Flight happens once every ten years-a gala to honor elites fallen in service of maintaining Upper Earth's powerful hold on earth's remaining populace and dwindling resources. It's a party where cunning new technology gets unveiled to masked revelers perpetually thirsty for fresh entertainment. It's also a party Raisa and Nayf plan to infiltrate to bring down Upper Earth for good.
 Even with a known traitor, and a mysterious, ruthless avenger in their midst, pulling off a dangerous mission in enemy territory feels possible with record-keeper Khalda at the helm. To crack into Upper Earth, simply find strategic details hidden in the records. However, they soon discover the toll of running a crew with competing, secretive goals: the lines between friend and foe begin to blur to violent ends. But on an oil rig at the edge of the world, the sun rises and shines on a team member no one knows about. Will she bring the seed of hope or be the source of ultimate chaos?Just who is she-and why does she know exactly how to end the world?