The Blade in the Ashes (House of Hyrax, #3) by Arcadia Rayne

Theadora Moore has lost everything.With Hyrax now seated on the Athenian throne and the palace under Caldrius’ control, Thea is trapped in a kingdom she no longer recognizes. Powerless and cut off from her magic, she must play the obedient heir while secretly searching for a way to end Hyrax’s rule before the Mortal Realm falls to ruin.Beyond the palace walls, Clayton Vail refuses to accept the loss of his kingdom. Joined by their closest allies, Clay races across the Mortal Realm to raise an army, gather ancient weapons, and save the woman he loves.But Hyrax’s influence is spreading, and with beasts from the Underworld now roaming freely, the realm stands on the brink of collapse. With every path forward shrouded in danger, Thea must find the courage to stand on her own–without magic, without her friends, without certainty.To save her realm, Thea must finally defy the God of Death.