This is a fascinating, well-researched, and. narrated book. Author Flores takes us on a journey of North America from the Ice Age to the present via the geology, climate, and animals that roamed and inhabited the vast lands. But honestly, I could not finish it because of the disturbing detail of man-inducted mass animal and bird extinctions over the millennia and recent centuries. (it's a personal thing for me and - a compliment to the author - for his riveting writing). That said, I nevertheless highly recommend this book.
An insightful look into America's pre and natural histories.