What does mark twain write about and how does he write about it?

Mark Twain wrote about lots of things. Many of his books were autobigraphical, like Life on the Mississippi and Roughing It. Others were fiction, like Tom Sawyer and Huckleberry Finn. He also wrote letters, short stories, and essays. His style is generally said to be humorous and satirical. You'll find out lots about him if you look up his name.