O. Henry was a prolific writer, completing nearly 600 stories in his lifetime. Some of his most famous stories include: "The Gift of the Magi," "A Retrieved Reformation," "The Cop and the Anthem," "The Duplicity of Hargraves," and "The Caballero's Way."
For other stories with twist endings, please see: "The Interlopers" and "The Open Window" by Saki, "Twin Study" by Stacey Richter, "An Occurrence at Owl Creek Bridge" by Ambrose Bierce, "The Lottery" by Shirley Jackson, "The Necklace" by Guy de Maupassant, and "Roman Fever" by Edith Wharton.
