Wild

The Call of the Wild It tells the story of barker, a beloved dog of judge miller's family, who has been living in a warm valley in southern California after being civilized. After being sold to the cold and remote north of the United States, rich in gold Alaska, became a sled dog. The story is about a dog's experience as a dog in the civilized world forced by its master to return to barbarism.
The cruel reality touched buck's instinct and consciousness of returning to nature due to the long-term edification of human civilization. The harsh living environment trained buck, he continued to grow in the experience. He eventually won the top spot in the sled pack by defeating spitz, the dog king. When the cruel Hal beat buck black and white and dying, John Thornton's rescue made buck feel warm and decided to pledge allegiance to his benester. However, the murder of benester completely broke buck's attachment to human society, so buck made a firm determination to go into the wilderness and return to nature.
And I think it is a book and I highly recommend it to you all.