Reign By Wrath by Ruby Vincent

Life has never been worse.
The Phantom who haunted my nightmares turned out to be bigger, badder, and deadlier than I ever knew was possible. My guys are in hiding. My allies are enemies. And I have nowhere to turn.
When new faces bring forth old grudges, it’s up to me to find the truth and put a stop to a terrible plan.
I came to Regalia to avenge my sister’s death. Now I’ll avenge every death, every secret, every lie. I’ll bring Regalia to its knees and bring the Royal line crashing down.
Their time was up the day the housekeeper’s daughter came to town.