You can download Sean Russel's The One Kingdom, first volume in The Swan's War trilogy, for only 0.99$ here.
Here's the blurb:
The cataclysm began more than a century earlier, when the King of Ayr died before naming an heir to the throne, and damned his realm to chaos. The cold-blooded conspiracies of the Renne and the Wills—each family desirous of the prize of rule—would sunder the one kingdom, and spawn generations of hatred and discord. Now Toren Renne, leader of his great and troubled house, dreams of peace—a valiant desire that has spawned hostility among his kinsmen, and vicious internal plots against his life. In the opposing domain, Elise Wills's desire for freedom is to be crushed, as an unwanted marriage to an ambitious and sinister lord looms large. As always, these machinations of nobles are affecting the everyday lives of the common folk—and feeding a bonfire of animosity that has now trapped an unsuspecting young Valeman Tam and two fortune-hunting friends from the North in its high, killing flames. But the closer Toren comes to achieving his great goal of uniting two enemy houses, the more treachery flowers. Nobles and mystics alike conspire to keep the realm divided, knowing that only in times of strife can their power grow. And perhaps the source of an unending misery lies before an old king's passing, beyond the scope of history, somewhere lost in a fog of myth and magic roiling about an ancient enchanter named Wyrr—who bequeathed to his children terrible gifts that would poison their lives...and their deaths. It is a cursed past and malevolent sorcery that truly hold the land, its people, and its would-be rulers bound. And before the already savaged kingdom can become one again, all Ayr will drown in a sea of blood.