Crown of Lies: Swapped, Stolen, Exposed

Ryker Levin has come home to hold the banquet that will name his daughter Keira his heir. He founded the family company and then spent ten years away on a classified state project, and while he was gone the housekeeper swapped the two girls, so the one waiting to be named is her own daughter. Ryker's two adopted sons knew about it and kept it going. Keira has been living in the house as the servant's child, and she has gone on pushing back at it the whole ten years. Ryker knows none of this when he arrives. After the swap comes out, he and Keira work on it together, and they set about making the housekeeper and the adopted sons answer for what they took.