A Christmas Carol by Charles Dickens is a beloved classic that tells the story of Ebenezer Scrooge's transformation from a miserly and insensitive person to a generous and caring human being. The book was written in 1843 to supplement Dickens' income and has become a staple of the holiday season. The story takes readers on a journey through Christmases past, present, and future, and is a reminder of the importance of charity and goodwill.