Meticulously researched, simply told and appropriate for readers of all ages, this second volume (after 1999’s Silverhair) in Baxter’s Mammoth trilogy brings to compelling life the complex culture of these giant creatures. It’s sixteen thousand years B.C., and woolly mammoths roam the earth, inhabiting the steppes of Beringia, the land bridge linking Asia and North America. Climactic changes have caused the steppes to recede, but humans, whom the mammoths call Fireheads, pose the greatest threat to their survival. Longtusk, whose coming-of-age story this is, must save the mammoths by spearheading an epic journey. Separated from his family, Longtusk is enslaved by the Fireheads, who make him a beast of burden. But a Dreamer (Neanderthal) woman foretells his future: Longtusk will die,...