R.C. Sturgis 
The Mammals That Moved Mankind [EPUB ebook] 
A History of Beasts of Burden

We drive off in our cars, catch trains, and fly to the other side of the world. But how did we and why did we first became mobile? This is a history of the extraordinary range of animals that helped drag Mankind out of pre-history and into his now extremely mobile present. We depended on just six animals to help us hunt, to carry us and drag our loads. Without dogs, horses, oxen, camels, elephants and reindeer, civilization would have taken a very much longer time arriving. But they provided much more than just transport and affected our lives in so many ways from milk to magic, from meat to trading and from games to war.