Book Three in the Antogne Ravynn trilogy by Rachel Coyne!
The conclusion to the Antigone Ravynn Series pits the Nine Houses of The Immortal Inferi against one another. The brothers of the Ninth House awaken, promising immense power that can destroy or save Antigone and her friends. Dante and his newly found Ravynn sister Aella struggle to save their families on opposite side of a war neither wants. As Mena becomes more entangled with their demon twin allies, Amadeo and Simonetta, Dante is afraid he’ll lose his baby sister no matter what happens in the war.