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The whole story spins around our dear Buck, who seems to go through a new challenge every minute. Buck is a strong and proud dog who used to live as a king, but now, he's struggling through his new life, which he describes as a life with the "Law of Club and Fang." This is the title of the second chapter and it just gives us an idea of how things work in this new life. People and other dogs take part in this life. The hierarchy is described as men being the top of it, then the strongest dogs, and finally any other dog who must strongly fight for survival. Bucks starts adapting to this new cold and wild environment really quickly, which is a good thing and people seem to be really satisfied with it. Of course, as every other dog, all the skills for survival in this place must be learned in the hard way. In this chapter, we find out that Buck is a fast learner and seems to adapt to whatever challenge that strikes him. Buck's a strong character who'll obviously change throughout the story. I've just read 2 chapters and the only main character seems to be Buck. Every other character is mentioned a few times or disappears in a way to never be talked about again.