The Apocalypse Ocean — Tobias S. Buckell

Relentless, breathtaking science fiction adventure across a watery world under seige... Humanity continues to gain control of the Forty Eight Worlds as they deorbit wormholes and join the many worlds and civilizations together. But as they do so, they must deal with the horrors of past injustices as humanity forms new societies out of the wreckage of the old. And some of those horrors aren't content to rest. Kay, who has rescued herself from a hellish life dominated by uncaring alien creatures, seeks bloody twisted revenge for what was done to her. And a new force is not happy about the manner in which the Forty Eight worlds are reshaping themselves. In fact, it's about to put a stop to it all.