Fallen Kings Cycle Series by Gail Z. Martin

As plague and famine scourge the Winter Kingdoms, a vast invasion force is mustering from beyond the Northern Sea. And at its heart, a dark spirit mage wields the blood magic of ancient, vanquished gods. Summoner-King Martris Drayke must attempt to meet this great threat, gathering an army from a country ravaged by civil war. And neighbouring lands reel toward anarchy while plague decimates their leaders... moreAs plague and famine scourge the Winter Kingdoms, a vast invasion force is mustering from beyond the Northern Sea. And at its heart, a dark spirit mage wields the blood magic of ancient, vanquished gods. Summoner-King Martris Drayke must attempt to meet this great threat, gathering an army from a country ravaged by civil war. And neighbouring lands reel toward anarchy while plague decimates their leaders. Drayke must seek new allies from among the living - and the dead - as an untested generation of rulers face their first battle. Then someone disturbs the legendary Dread as they rest in a millennia-long slumber beneath sacred barrows. Their warrior guardians, the Sworn, know the Dread could be pivotal as a force for great good or evil. But if it's the latter, could even the Summoner-King's sorcery prevail? less

In the epic conclusion to the Fallen Kings Cycle, set in the world of The Chronicles of the Necromancer, war has come to the Winter Kingdoms. Summoner-King Tris Drayke takes what remains of his army north for a war he is ill-prepared to fight, as reports from spies confirm Tris's worst fear. A new threat rises across the a dark summoner who intends to make the most of the Winter Kingdoms' weakness... moreIn the epic conclusion to the Fallen Kings Cycle, set in the world of The Chronicles of the Necromancer, war has come to the Winter Kingdoms. Summoner-King Tris Drayke takes what remains of his army north for a war he is ill-prepared to fight, as reports from spies confirm Tris's worst fear. A new threat rises across the a dark summoner who intends to make the most of the Winter Kingdoms' weakness.In Isencroft, Kiara's father is assassinated, and she has no choice except to return and claim the crown. But she must leave behind her husband and their infant son to face the dark power that threatens her rule.The Dread will rise. Kings will fall.  The Chronicles of the NecromancerThe SummonerThe Blood KingDark HavenDark Lady’s Chosen Fallen Kings CycleThe SwornThe Drea less