Roots of Ruin

They did the impossible, but their problems are far from over...
After freeing the Delmarion empire, Rose and Rayce must go to Varsha, the desert home Rose fled when she was a child—the country she's meant to rule.
Rayce is the new emperor of Delmar, Varsha's longtime enemy, but that won't stop him from assisting the girl he loves. Armed with the brute force of Rayce's military, Rose sets out to free her people from the oppressive rule of the usurper king who killed her father.
But even if they win, how can she be queen to her homeland and in love with the man ruling its bitter enemy? With her loyalties split between heart and crown, Rose must find a way to do the impossible again...unite two kingdoms at war, or sacrifice half of herself to save the other.
The Garden of Thorns series is best enjoyed in order:
Book #1 Garden of Thorns
Book #2 War of the Wilted
Book #3 Roots of Ruin