And the Ocean Was Our Sky by Patrick Ness

With harpoons strapped to their backs, the proud whales of Bathsheba’s pod live for the hunt, fighting in the ongoing war against the world of men. When they attack a ship bobbing on the surface of the Abyss, they expect to find easy prey. Instead, they find the trail of a myth, a monster, perhaps the devil himself…

As their relentless Captain leads the chase, they embark on a final, vengeful hunt, one that will forever change the worlds of both whales and men.