Batman: The Long Halloween by Jeph Loeb and Tim Sale
Christmas. St. Patrick's Day. Easter. As the calendar's days stack up, so do the bodies littered in the streets of Gotham City. A murderer is loose, killing only on holidays. The only man that can stop this fiend? The Dark Knight. In a mystery taking place during Batman's early days of crime fighting, Batman: The Long Halloween is one of the greatest Dark Knight stories ever told.