Valence: Confluence, Book 4 (Unabridged‪)‬

Earth's days are numbered. Two very different women race to prepare for the battle to come. The future of Earth is in their hands.

One struggles to resurrect her ruined ship so she can navigate the politics at the galactic core in a desperate bid to recruit allies. The other strives to master alien technology to supply the forces of Earth with the tools needed to defend themselves against the ravenous Swarm.

Between them, Jane and Zara offer humanity its best chance at survival, but the odds are stacked against them and their best may not be good enough.