Complex sentence: In the novel, it is said that he got his nickname because he has a nose like a Turkish scimitar, has a Turkish wife and kids and also because he does much of his business (growing poppy) in Turkey.
Split into simpler sentences: In the novel, it is said that he got his nickname because he has a nose like a Turkish scimitar. He also has a Turkish wife and children, and does much of his business (growing poppy) in Turkey.