A Christmas Carol by Charles Dickens is a classic story of redemption and transformation. It tells the story of a grumpy and miserly old man named Ebenezer Scrooge who is visited by three ghosts on Christmas Eve. The ghosts take him on a journey through his past, present, and future, showing him the error of his ways and the importance of kindness and generosity. The story has been adapted into various films, plays, and even musicals, making it one of the most beloved Christmas stories of all time.