American Writer is a term that encompasses many authors from the United States. Edgar Allan Poe, POE (3 letters), was an American poet, author, and literary critic who wrote during the 19th century. He is best known for his dark and mysterious works such as 'The Raven' and 'The Tell-Tale Heart'. EdgarA Poe, EDGARAPOE (9 letters), was a pseudonym used by Poe to sign some of his works. Samuel Clemens, SAMUELCLEMENS (13 letters), was an American author and humorist who wrote under the pen name Mark Twain. He is best known for his novels 'The Adventures of Tom Sawyer' and 'Adventures of Huckleberry Finn'.