A Shadow Bright and Burning (Kingdom on Fire series)

Henrietta Howel can burst into flames, making her the first female sorcerer in centuries. After revealing her power to save a friend, she is invited to train among the queen’s royal sorcerers rather than face execution. In Victorian London, Henrietta is declared the person meant to lead the fight against the seven Ancients, demons terrorizing humanity. As she trains with other young sorcerers, the true nature of her ability could be exposed.