From Publishers Weekly

Starred Review. The rousing fifth installment of Butcher's military fantasy cycle (after 2007s Captains Fury) finds the land of Alera recovering from Lord Kalaruss rebellion, an invasion by the wolven Canim and a bloody slave revolt. Now a new threat emerges: the all-devouring insectoid Vord, who have learned to control the elemental furies that once protected Alera. Young Tavi of Calderon, recently recognized as the heir to Aleras throne, fights seasickness and interspecies hostilities escorting the Canim invaders back to their homeland, only to negotiate a fragile alliance with them against the Vord. No less powerful than his intense battle scenes, Butchers vivid characterizations, based on ancient Roman Republican ideals, range from duty-honor-country austerity in battle to brilliant peacemaking, noble self-sacrifice and Tavis coming-of-age as a wise Marcus Aurelian ruler. (Dec.)
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From Booklist

In the fifth Codex Alera novel, Tavi is the recognized heir to the throne. When armistice with the Canim ends, and he and his legions take the Canim in Alera home, they discover that the Vord, hostile to Aleran and Canim alike, have ravaged Cane, and now the former foes must fight the common enemy. Meanwhile, Alera struggles to rebuild after civil war, but that doesn’t stop intrigues among the power-players. Perhaps the Vord attacking with the Alerans’ they-thought-unique weapon, furycrafting, will. A treat for action fans and series followers. --Frieda Murray