Jack London 
The Call of the Wild [EPUB ebook] 

The Call of the Wild is one of Jack London’s most famous novels. It is set in Canada during the 1890s Klondike Gold Rush, when strong sled dogs were in high demand. The central character of the novel is a dog named Buck. The story opens at a ranch in the Santa Clara Valley of California when Buck is stolen from his home and sold into service as a sled dog in Alaska. He progressively reverts to a wild state in the harsh climate, where he is forced to fight to survive.
A thrilling novel, and a classic about wildlife.