Andromeda's War (Legion of the Damned prequel 3)

Now a platoon leader, Legionnaire Andromeda McKee seems to have successfully left behind her true identity of Lady Catherine «Cat» Carletto, one of the last two surviving members of the Carletto family targeted for death by Empress Ophelia. After failing at her one shot at vengeance, Andromeda had been questioning her own resolve. But now her uncle has been killed in a government raid back on Earth, leaving her as the Carletto family's only chance for justice. As a legionnaire, Andromeda McKee has countless kills under her belt. But when faced with her greatest enemy, it will be Cat Carletto who has to pull the trigger on the one who really matters…