Mark Twain was an outstanding American writer and journalist in the USA of 19th century. His works cover many topics among which are the follows: realism, romanticism, humor, satire and along with this the author was on the position of humanist and democrat. On the top of his career he was considered to be the most readable and well-known author in America. According to Ernest Hamingway, the real American literature started with Mark Twain. William Folkner called Twain “the first real American writer”. The pseudonym was taken by Samuel Langhorne Clemens from his youth when he served on the sheep. He was a pilot’s assistant on the river Mississippi, and the “mark twain” denotes the minimal depth for vessels to pass by. Samuel Langhorne Clemens was born November 30, 1835 in a small town Florida. The writer even joked that his birth increased the population of the town by 1 percent. He was the third child in the family of John and Jane Clemens. Still a little child, Twain moved with his family to Hannibal, Missouri.