The Veil of Blood and Magic by Jade Presley

Desire has a thousand different flavors, just like blood, and I need both to survive. And when everyone who uncovers my secret wants me dead, it’s all I can do to stay alive.
I’ve spent the last decade biding my time until I can do what I’ve dreamed about since my family was brutally murdered…
Kill the Collector and everyone he holds dear.
He’s a ruthless tyrant who overthrew a kingdom. No one is safe from him or his soldiers, who murder anyone he points his gilded finger at.
With an ailment that’s counting down my heartbeats until it stops completely, I have to make the most of every single day, even while on the run. I have fun where I can, but I never let anyone know the real me. It’s not safe.
But it’s a lonely life to live. And I’m tired of running.
When a pair of drifters—monster bounty hunters—find me, I decide to let them catch me.
It’s the only way I’ll get close enough to kill the monster who destroyed my life.
The drifters are nothing more than a means to an end, but I can’t deny that their blood is addictive. The more time we spend on the road, the more I realize they aren’t what they seem, and I hate myself for growing attached to my captors.
But if they discover my secret, they’ll kill me.
And dying isn’t part of the plan.