Adversarius, Shadow of the Rose: Book One

Two kingdoms. Two goals. The race of a lifetime.
The neighboring kingdoms, Paridzule and Relavia, have been at war for over five hundred years. An accidental alliance is about to be formed when Kayta, daughter to the King of Paridzule, becomes secretly engaged to Alabassin, heir to the Relavian throne.
Peace does not come without sacrifice, or challenges. Alabassin's father soon discovers his son's treason, and is more determined to prevent that alliance from forming. No matter the consequences.
When Kayta and her brother, Hedric, disappear, the world assumes the worst. Their sister threatens to abdicate, leaving Paridzule exposed, and vulnerable with no ruler.
Now, an unlikely, rag-tag group must align to make sure Relavia's king does not invade Paridzule, taking the first step in what could become total domination.