PBS marks Dickens' bicentennial with two films, "Great Expectations" and "The Mystery of Edwin Drood." The author remains one of the best-selling writers of all time. Temple English professor Peter Logan says Dickens' popularity is due in no small part to his willingness to portray the lives of ordinary people. "Dickens was one of the first novelists who really did identify with the disenfranchised, people who really led a precarious existence," said Logan.