Cardinal House by K. L. Taylor-Lane

Obsession.
As a Blackwell, it’s my curse.
It lives in all five of my brothers. Two hearts thriving with it, three of them rotting, but I didn’t believe in it. Didn’t want to believe that it would latch itself onto me, sink its claws bone deep and never let go.
Until I meet her.
Suddenly, my whole world shifts, my focus is her and only her, and I won’t stop until she’s mine.
Then, all too quickly, she’s gone.
Stolen away from me in the night, my heart is in pieces.
Rain. Blood. Coffin.
But I won’t give up.
I’ll fight to bring her back to me, uncover her past, and hunt the people that hurt her. Can I defeat the monsters that haunt her, or will I end up being the worst monster of them all?