The Wild Robot Protects by Peter Brown, book 3 in the Wild Robot series

Life for robot Roz And the animals on their island is perfect. But when an injured seal washes ashore and warns of dangerous waters that are flowing toward the island, the animals are forced inland and fight over dwindling resources. 
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. 
Like new, hard cover.