The Fate of Kings and Queens - Legends of the Carolyngian Age, #4

A land torn apart by long-standing rivalries and uneasy alliances, two young lovers become entwined in an alliance meant to unite kingdoms-but fate has other ideas. When Prince Gabriel, from the Kingdom of Lotcala, and Princess Syrena, from the Queendom of Amazon, finally exchanged their marriage vows, they dreamed of a future of peace. Those lofty dreams are broken when an ancient rival kingdom breaks the recently forged truce, killing Prince Gabriel's father and older brother.
This multilayered act of evil plunges the two nations into a brutal conflict with dreadful adversaries. Now, on the front lines of a war neither of them wanted, Gabriel and Syrena must navigate treacherous court intrigue, navigate deadly battlefields, and confront both enemies in the open and those lurking in shadows. With the fate of their homelands hanging in the balance, the pair must rally their people, and fend off formidable enemies if they have any hope of securing a future together. Join Gabriel and Syrena on an epic journey of love, loss, and triumph as they strive to bring peace to a land torn apart by conflict.
In a tale of courage, sacrifice, and the enduring love, they will discover that sometimes, the greatest battles are fought not with swords, but with the strength of the heart.