The story of Buck, a St. Bernard/Shepherd cross family pet, stolen and subsequently sold to become a sled dog in the harsh environments of the Alaskan wild. Passed from owner to owner, Buck soon learns that the only way to survive is to use his sheer size to overpower any would be attackers and show them who's boss.
Told from an odd combination of Buck's perspective in third person, we slowly see Buck transform from beloved family pet to the savage mutt, fighting to survive in the (excuse the pun) dog eat dog world, finally to the wild and free dog, adopted by the local wolf population.
I have to admit, I'm fond of books told from an animals perspective (Black Beauty being one of my all time favourite books), horrified at the way people treat them, heart melting when they at last have a happy ending. Though the setting wasn't really appealing to me, I still enjoyed the story.