Lost Moon by Ellis Logan

Cat-eared chimeras, hunky detectives, cagey zealots and a slave-trading space station.
Many people dream of an off-world life, but for Nikta Kozan the wilds of Renga are more than enough. She has plenty to do, delivering mail in a lawless frontier, reporting back to her magic-wielding cousins at the shadowy Enso, and trying to mend relations with her brother at the Chalinex City Police Department. When one of her favorite customers complains about a missing grandson, can she hand over the case to the cops or will this feisty ket have to handle things on her own? Find out in this thrilling, action-packed sequel to Post Magic.
If you liked Firefly, Dark Angel, Lost Girl, Dark Matter or the Dresden Files, you'll love Post Magic, a wild paranormal space fantasy with steampunk elements.