Forged in Chaos by Abigail Glenn

For Tenah Delemor, loyalty is everything. She’s dedicated her life to the art of honing magic, determined to cure her ex-assassin father of his sentient curse. When a shocking betrayal leads to her execution, fury guides her into the temple of a mysterious, alluring death king. He promises a second life and a chance to end her father’s spreading destruction, but at a steep cost—the same curse that wreaked havoc upon her family. A curse that seeks to crown her the most dangerous enemy of all. Her only hope for the peace she’s always craved requires the courage to delve between worlds and confront the horrible secrets from her past.
For Renton Murfell, a skilled hunter of dark magic, the successful completion of his next contract means his younger brother walks free from the shackles of his wicked employer. Only, Tenah—a lethal dark magic caster and his prey—isn’t what he expects at all. Their chemistry rivals every belief drilled into him, threatening to ruin his profession and unleash war across the Kandar Isles.