The Chosen – Rise of Cithria Book 1, by Kris Kramer

Three kingdoms at war. Three stories of hope, sorrow, and sacrifice. Three groups of heroes, whose personal quests lead them to discover that a fourth kingdom, long forgotten, lies dormant. But no more. Unless these heroes, bitter enemies of each other, can put aside their enmity, then Cithria will rise again, and everyone else will fall into the abyss. rn