Law of Survival by Kristine Smith
It takes a killer to catch a killer.
Jani Kilian finally has her life under control. Discharged from the Service, she's become an important player in negotiations with the alien idomeni.
But when a classified report containing revelations about past crimes comes to light, Jani realizes that old enemies still seek to destroy her. As dangers mount and those closest to her are threatened, a hard lesson learned during her years on the run hits home. Whether in colonial back alleys or halls of power, the game is life and death, and only the winner survives.