Fireblood

the long version

To save a kingdom, Zara must choose between a prince who could be the answer and a rising rebellion that threatens to take control. When Zara Dane is chosen to marry Prince Sebastian Hart, son of the man who ordered her father's capture, Zara knows she must fight to save everything she loves from ruin. Being betrothed to the prince means a life trapped behind the towering stone walls of the Camelot-forged realm. Under the watchful eye of the prince's first knight, Sir Devlan Capra, changing her future becomes difficult. When an unlikely rebel reveals the truth about the deadly secrets that fue.