What is the author's style in Life on the Mississippi by Mark Twain?

Life on the Mississippi is told from the point of view of Mark Twain (his pen name; Twain's real name was Samuel Clemens), the writer and former steamboat captain who later returns to trace his earlier footsteps up and down the river. Twain's point of view is unique in that he has seen the entire rise and fall of the steamboat industry: from his days as a boy, when steamboats were the most important and almost the only way to trade goods throughout a large part of the United States, to the latter part of the nineteenth century and early twentieth century, when the industry had in large part been replaced by trains and the geography of the Mississippi had changed enormously. Twain's point of view, though limited mostly to his personal experiences, is also vast in that he describes the larger historical context in which many of the events, anecdotes, and descriptions with which he provides the reader occurred. At the same time, he provides numerous other first-hand accounts of the river, from tourists to travel writers to letters and anecdotes he has overheard, which support many of his claims and help to make the reader's understanding of the river even stronger.