Mark Twain
American vernacular, put on the page.
Mark Twain was the pen name of Samuel Clemens (1835–1910), taken from a riverboat leadsman's call meaning two fathoms — safe water. He grew up beside the Mississippi in Missouri, and the river runs through most of the work that lasted.
The vernacular
Twain's central technical contribution was writing American speech as it was actually spoken, in dialect, with regional grammar intact, and trusting it to carry a serious novel. Before Huckleberry Finn narrators wrote in literary English regardless of who they were. Hemingway's claim that all modern American literature comes from that one book is an overstatement pointing at something real.
Major works
The Adventures of Tom Sawyer (1876) is a boyhood idyll. Adventures of Huckleberry Finn (1884) is far darker, narrated by Huck himself as he travels the river with Jim, an escaped enslaved man. Life on the Mississippi (1883) is memoir. A Connecticut Yankee in King Arthur's Court (1889) is satire aimed at both medieval romance and industrial modernity.
The Huckleberry Finn debate
The novel is both frequently taught and frequently challenged. It contains repeated racial slurs and depicts the racism of its 1840s setting directly. Readers who defend it argue the book is an attack on slavery, told through a narrator whose conscience contradicts everything he was taught — the moral turn where Huck decides to help Jim and expects damnation for it is the centre of the book. Readers who object point to the cost of teaching that language to students who bear it, and to Jim's treatment in the closing chapters.
Both positions engage seriously with the text. Framing the disagreement as censorship against literature misrepresents it.