O. Henry (1862–1910), born William Sydney Porter, was an American short story writer renowned for his wit, wordplay, and twist endings. His most celebrated works include "The Last Leaf," "The Gift of the Magi," and "After Twenty Years." Throughout his life, he held various jobs, such as pharmacist, bank teller, and journalist. During his tenure at a bank, he was accused of embezzlement and subsequently imprisoned, an experience that profoundly influenced his literary themes. O. Henry's stories often depict the lives of ordinary people, highlighting their inherent warmth and the ironies of life, delivering social messages through his unique narrative style. His masterful storytelling and surprise endings continue to captivate readers worldwide.