Heartless by Simone Leigh Martin

Little Freak.
I’ve been called lots of names at Hunter Moon Academy, but that’s the worst. Because it’s a secret that’s going to get me killed. And the one holding it over my head is Callum Sawyer, the cruelest alpha in the school.
The Sawyer pack heir never wanted me at this school, and even though I now have claws, he’s forcing me into an impossible deal. Something which his friends and rivals – the two alphas who own a part of me – will never understand.
But there’s more to this world than the four walls of the academy. My family, the most ruthless pack in shifter history, has plans for me. And the Devil of the Horn, with secrets of his own, is never far away.
My one chance to escape disappeared on the night of the Packball Cup. But if there really is a refuge for shifters like me, I’m going to do everything I can to find it. And all the claiming marks and broken hearts in the world won’t stop me.