Life for Roz and the animals on their island is perfect: wild, natural, and harmonious. Her son has even found a mate! But then, one day an injured seal washes ashore and warns of dangerous, cloudy waters that are flowing toward the island... This thrilling third installment of the Wild Robot series takes readers on a new adventure under the ocean and to the frigid northern waters where Roz may have to make the ultimate sacrifice. 8+ The internationally bestselling 'The Wild Robot' series returns!