Aliens came to Earth forty years ago. Their anatomy proved unfathomable and all attempts at communication failed. But through trade, humanity gained technology that allowed them to colonise the stars. The price: live humans for every alien faster-than-light drive. Kara's sister was one of hundreds exchanged for this technology, and Kara has little love for aliens. So when she is drafted by GalDiv - the organisation that oversees alien trades - it...