Taylor Anderson's enthralling New York Times bestselling alternate history series continues as game-changing revelations upend the Grand Alliance in a potentially cataclysmic war. Reddy and his crew have given their all to protect the oppressed Lemurians. But with Walker in desperate need of repairs just as the Grik's First General is poised to strike, Reddy is desperate. With more enemies than ever before arrayed against them, the crew of Walker needs new allies. That means combing the lethal wilds of Madagascar to find the Lemurians' fabled ancestors, as well as the enigmatic dwellers east of the Pass of Fire. But what Reddy's crew unearths are discoveries so shattering they could tilt the balance of the war in either direction. But Reddy's greatest adversary is from his past: a madman named Kurokawa whose single-minded mission of revenge will shake the Alliance to its core and raise the stakes to the most personal and terrifying levels Reddy has ever faced.