Angel by K.M. Raya

A single day at Draven Preparatory Academy and she’s already made enemies. They call themselves The Brotherhood. Carter, Holden, Captain and Ellis rule the school like gods while their fathers rule the city. But Angel Valentino has never been one to take orders blindly. After her father–one of the most feared and infamous mobsters on the East Coast sends her to Draven, Angel finds herself entangled in a web of love, lies, death and darkness.
Being a Brother comes with a heavy price and an unshakable legacy that spans generations. They don’t like this baffling new girl who threatens to turn their world inside out. She might just be the most beautiful, most darkly alluring girl any of them have ever laid eyes–with a heart of steel and intellect well beyond her years, but Angel has secrets too . . . and in their world, secrets get you killed.