Kameron Hurley’s 2017’s The Star Are Legion is a standalone space opera.
In a distant future, a flock of huge world-ships orbit an unnamed star. Within the ships, there are life forms of all kinds, including humans. But every living thing has its allotted span and the world-ships are no exception. They are dying and when they do die, so too will all the humans who live within them.
Zan and Jayd have a cunning plan to escape the coming mass extinction. The cost of the plan will be much greater than they expect.