In the Shadow of the Sabertooth: A Renegade Naturalist Considers Global Warming, the First Americans and the Terrible Beasts of the Pleistocene

In the Shadow of the Sabertooth covers the last global warming 15,000 years ago in North America. It's a study of the animal and plant life that either adapted or perished as the glaciers melted, and the first humans migrated to the continent. In the book, Peacock finds lessons for modern people along this ancient trail.