"Twenty Thousand Dollars" is a short story written by O. Henry, an American author known for his twist endings and clever narratives. The story revolves around a man who finds himself in a moral dilemma when he discovers a large sum of money. The plot explores themes of greed, honesty, and the impact of wealth on human behavior. As the protagonist grapples with his choices, the story highlights the complexities of human nature and the consequences of decisions made in the face of temptation.