Life on the Mississippi is a memoir by Mark Twain detailing his days as a steamboat pilot on the Mississippi River before the American Civil War. The book begins with a brief history of the river from its discovery by Hernando de Soto in 1541. It continues with anecdotes of Twain's training as a steamboat pilot, as the 'cub' of an experienced pilot. He describes, with great affection, the science of navigating the ever-changing Mississippi River. Excerpted from Wikipedia, the free encyclopedia.