1. The Adventures of Tom Sawyer: This classic novel tells the story of a mischievous boy growing up in pre-Civil War Missouri.
2. The Adventures of Huckleberry Finn: This sequel to Tom Sawyer is considered one of the greatest American novels ever written. It follows the journey of Huckleberry Finn, a runaway boy, as he travels down the Mississippi River with a runaway slave named Jim.
3. A Connecticut Yankee in King Arthur's Court: This humorous time-travel novel follows the adventures of Hank Morgan, a modern American who is mysteriously transported back to medieval England.