Fortune's Pawn (Paradox, Bk. 1)

Deviana Morris isn't your average mercenary. She has plans. Big ones. And a ton of ambition. One of those is going to get her killed one day - but not just yet. Not when she just got a job on a tiny trade ship with a nasty reputation for surprises. The Glorious Fool isn't misnamed: it likes to get into trouble. And with a reputation for bad luck that makes one year as security detail on this ship equal to five years everywhere else - Devi knows she's found the perfect way to get the jump on the next part of her Plan. But the Fool doesn't give up its secrets without a fight, and one year might be more than even Devi can handle.