Fun and frolic with an all-boy kid in a small town in mid 19^th-century USA. A classic, and deservedly so.

Another attack on prejudice, Twain has a pauper show up at Buckingham Palace who is a dead ringer for Edward, Prince of Wales, Henry VIII's son. They get switched. Edward is treated like a dog, and the pauper is treated like royalty, and we see that both are silly. Henry dies, the pauper is about to be crowned Edward VI, and it all comes together. A good tale told well. Even without the moral, this is Twain's best, IMHO.

See Huck Finn, above.

Modern (late 1800s) man somehow ends up in King Arthur's Court. His knowledge of science and engineering should make him the most powerful man of the times, but there's this nasty concept of nobility and birth and so forth always getting in the way. How could we possibly put you (or your best students) in charge, when men of higher birth are all over the place? This is a criticism of prejudice hidden in an interesting concept and quality writing.