The Forsaken Prince by Madison Rosipal

Born in a world where her people were once deemed criminal, Princess Celestine of Yulia walks a delicate path. Not only is she a descendant of the royal family that led the massacre of people with magic, she was also born a magician. In her search for belonging, she uncovers a family secret dating back centuries and a murderous plot that's been brewing for ages. Pulled between two worlds, she struggles to preserve peace, but will her efforts pay off?