2012’s The Apocalypse Ocean is the fourth volume in Tobias S. Buckell’s Xenowealth series1.
Bred by the alien Nesaru to manage other human slaves, Kay survived the slaughter that ensued when humans liberated Nesaru-dominated Okur. As the book opens, Kay has found her way through the wormhole network to backwater Placa del Fuego, where the determined sixteen-year-old set out to conquer the world. Or at least the underworld.
There is a small sticking point: the Doaq.