Heir to the House by Teresa Hann

I fought to win my freedom.
Now I fight to keep it.
I have a hell of a semester ahead.
Through blood and cunning, my mother and I escaped the sadistic clutches of House Redbriar. Now, I just want to finish my first year at Wraithwood Academy in peace, studying demonology and magecraft alongside my boyfriends while unraveling the mysteries of the school.
If only I could be so lucky. War has erupted between the two most powerful mage families. On one side are my old enemies from House Redbriar, and you’d better believe they’re out for my blood. On the other is troubled, ruthless, devastating Arcturus Nightfeld, whose dark past threatens the fragile connection growing between us.
Caught between two sides, I’ll do whatever it takes to protect the ones I love. But the more desperate my enemies get, the more dangerous they grow. And I’m discovering that some evils just won’t stay buried…