The Shadow & The Sun by Monica Enderle Pierce

Shadow Mage Gethen, a powerful necromancer, guards the border between the living and the dead, and he’s never needed anything from anyone. Militess Halina is the bastard daughter of the king of Ursinum. She’s a formidable knight who uses her body to reward her loyal soldiers and to punish her enemies. And she’s never met a man she couldn’t command or crush.
Until now.
Passion and power ignite when a blizzard traps Halina at Gethen’s citadel. As an evil entity’s attacks deteriorate his sorcery they must embrace their unexpected attraction. Because their passion may be the key to defeating an ancient enemy that’s hell-bent on obliterating their world.

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Category: Fantasy – Sword & Sorcery

Leader. Soldier. Pawn.
Militess Halina has claimed numerous victories for her king and country. Now she’s under siege inside her own castle, held by enemies determined to start a war and condemn her lover as both a king-killer and a child-slayer.

Necromancer. Healer. Protector.
Sun Mage Gethen commands life and death, but even such power may not be enough to free his beloved militess or defeat a resurrected evil that feeds on the kingdom’s most innocent victims.

Separate they’re vulnerable. Together they might stand a chance.
In a battle for souls and survival, a warrior fights for the kingdom she serves and the man she loves, even as her beloved mage must triumph over an undying malice to save the woman he adores and the legacies of two nations.