Dark Lady's Chosen - Chronicles of the Necromancer, #4

Loyalty. Honor. Magic. Sacrifice. Treachery & blood magic threaten King Martris Drayke's hold on the throne he risked everything to win. As the battle against a traitor lord comes to its final days, war, plague & betrayal bring Margolan to the brink of destruction. Civil war looms in Isencroft, forcing Kiara to make hard choices between her duty to her kingdom-by-blood and her commitments to her kingdom-by-marriage.
Thrones and successions are at stake, and a wrong choice could change the history of the Winter Kingdoms forever. In Dark Haven, Lord Jonmarc Vahanian has bargained his soul for vengeance, plunging into a conflict among ancient immortals based on grudges centuries in the making. If he succeeds, Jonmarc preserves the truce, stops the bloodshed, and saves what matters most. Failure brings destruction-and dooms his soul for eternity. Dark Lady's Chosen is an action-packed epic fantasy adventure filled with magic, occult lore, honorable ghosts, vampire politics, loyal friends, found family, bloody battles, immortal creatures, secrets, hard choices, and star-crossed love! Book Four in the Chronicles of the Necromancer