From Unseen Fire

From Unseen Fire is the first novel in the Aven Cycle, a historical fantasy set in an alternate Rome, by debut author Cass Morris.
The Dictator is dead; long live the Republic.
But whose Republic will it be? Senators, generals, and elemental mages vie for the power to shape the future of the city of Aven. One such mage, Latona of the Vitelliae, must rediscover her incredible powers of Fire and Spirit—which she suppressed for years at the Dictator's court—in order to protect her family and the city she loves.
Her siblings—a widow who conceals a canny political mind in the guise of a frivolous socialite, a young prophetess torn from the sanctuary of her temple, and a military tribune leading a dangerous expedition in the province of Iberia—will be her allies as she builds a place for herself in this new world, against the objections of their father, her husband, and the strictures of Aventan society.
Their paths intersect with that of...