Honor Among Thieves by Rachel Caine and Ann Aguirre 

Petty criminal Zara Cole has a painful past that’s made her stronger than most, which is why she chose life in New Detroit instead of moving with her family to Mars. In her eyes, living inside a dome isn’t much better than a prison cell. Still, when Zara commits a crime that has her running scared, jail might be exactly where she’s headed. Instead, Zara is recruited into the Honors, an elite team of humans selected by the Leviathan—a race of sentient alien ships—to explore the outer reaches of the universe as their passengers… Read more.