Jack London 
The Call of the Wild by Jack London [EPUB ebook] 

‘Call of the Wild’ is the story of Buck, a magnificent dog who is stolen from his idyllic life and sold for use on a Yukon dogsled team. His travels are not only of a physical nature, as he learns hard discipline from men who must discipline their dog teams, but his own journey back to his primordial roots in the frozen tundra — the roots of wolf. This amazing story of transformation is beautifully written and provides a glimpse of the hard life in the Yukon Territory during the 1900s.