From Stephen Baxter, one of today's most acclaimed writers of science fiction and fantasy, comes this unforgettable saga of life and loss in the grand tradition of Watership Down.For fifty thousand springs, Silverhair and her kind, the last of the woolly mammoths, have lived in a remote tundra, rimmed by ice and sea and mountain. Soon to be a mother, Silverhair looks to the future with hope. But even as her life begins, the world she loves is ending. A new menace, more vicious than any enemy, is descending upon the snowlands -- a two-legged creature that kills for joy. Desperate to save their kind, Silverhair and the matriarch, Owlheart, must travel across the glacial torrents, beyond the saw-toothed mountains. There they will seek help from the distant cousins who found their destiny in the sea, and from an enemy -- an ice-faced menace known as...the Lost.