Nahara by Verity Reynolds
In this sequel to Verity Reynolds' debut novel Nantais, Something is rotten in registered space--and the crew of the Jemison intend to find out what it is.
After uncovering a slavery plot on a far-flung space station, the Jemison heads for an even further-flung planet suspected of supplying the trafficked slaves. They find the last thing they expect: a Niralan colony lost for centuries, guarding a terrible secret. But the Jemison's crew are carrying deadly information of their own in a book whose destructive--or creative--force could change life as they know it.
And Compliance is coming for them.