Quinten’s Choice by K.S. Augustin

After helping them successfully free a group of Transitionals held at the secret Rannler facility, the best bounty hunter in the galaxy suddenly disappeared. A year and a half later, Quinten still doesn’t know what happened to her.

Then he gets a message from the Telaris system that raises more questions than it answers. Is it Vigo? If so, what is she doing at the edge of Republic space? If it isn’t, who are they, what do they want, and why are they using her name?