Blood Bound by Jane Parker

Some secrets are written in blood.

Xavian is running out of it.
Bound to a cursed blade that devours souls, he’s spent years buying his survival one kill at a time. It’s simple: feed the weapon, or become its next meal.
He doesn’t make mistakes.
Until Morgan.
She’s meant to be nothing more than another body in the dark—but the moment he touches her, the blade goes still. The voices vanish. The hunger… stops.
Xavian has no idea why.
He only knows he can’t let her go.
Morgan refuses to play the victim, even as he drags her into a world she doesn’t understand. She fights him, questions him—and somehow gets under his skin in ways the blade never could. But the longer she stays, the more unstable the curse becomes.
Because the silence isn’t peace.
It’s a warning.
Something inside the blade has noticed her. And whatever it wants, it’s waking up.
Now Xavian is caught between the weapon that owns him and the only person who’s ever weakened its hold. Protecting Morgan could cost him his life.
Letting her go might cost far more.

Blood Bound is a dark romantasy packed with a ruthless anti-hero, explosive enemies-to-lovers tension, and a deadly curse that’s only just beginning to reveal its true power.