The Twelve Kingdoms Series by Bree Pierce

He hated everyone. Even her. A burning rage brought on by a pivotal moment in Bartholomew's life buried itself deep into his heart, transforming him into someone else entirely. His only salvation is when the Provincial General of the realm, Kato, whisks him away aboard his ship as he patrols the twelve kingdoms to ensure peace. Kato is determined to rid Bartholomew of his anger and bring back the man he was. Two years later, Bartholomew only wants her forgiveness. But everyone has secrets... moreHe hated everyone. Even her. A burning rage brought on by a pivotal moment in Bartholomew's life buried itself deep into his heart, transforming him into someone else entirely. His only salvation is when the Provincial General of the realm, Kato, whisks him away aboard his ship as he patrols the twelve kingdoms to ensure peace. Kato is determined to rid Bartholomew of his anger and bring back the man he was. Two years later, Bartholomew only wants her forgiveness. But everyone has secrets. Even Kato. A journey into The Dark Forest of Mimas endangers the happiness of both men as they attempt to eliminate the threat of the undead to the realm. less