Rising (The Coven of Zora) by L.D. Valentine

When Xavier arrives home on the last day of school, he walks into a horrifying scene of his uncle being consumed by a demon. After being rescued by a vampire named Serea, he finds himself thrust into a dark reality as a fledgling witch. Now Xavier must chart a new life while within the confines of the mysterious organization known as Zora. Can Xavier and his fellow witches protect themselves and humanity from a plot that threatens their nation?