“William Sydney Porter (September 11, 1862 – June 5, 1910), known by his pen name O. Henry, was an American writer. 

O. Henry's short stories are known for their wit, wordplay, warm characterization and clever twist endings” – this is what Wiki can tell us about this author first of all. But there are many other things to know about his works. His stories are also known for witty narration. O. Henry's work is wide-ranging, and his characters can be found roaming the cattle-lands of Texas, exploring the art of the con-man, or investigating the tensions of class and wealth in turn-of-the-century New York. O. Henry had an inimitable hand for isolating some element of society and describing it with an incredible economy and grace of language. 

                                                 He really followed his words: 

                                                         “Write what you like; there is no other rule".