Batman: The Long Halloween" is a 13-issue comic book limited series written by Jeph Loeb with art by Tim Sale. It was originally published by DC Comics in 1996 and 1997.
The Long Halloween was heavily influenced by film noir and films such as The Godfather. In continuity terms, the series continues and concludes the story of Carmine Falcone who was introduced in Batman: Year One. It also revolves around the gradual transition of Batman's rogues' gallery from simple mob goons to full-fledged supervillains.
Taking place during Batman's early days of crime fighting, this collection tells the story of a mysterious killer who murders his prey only on holidays. Working with District Attorney Harvey Dent and Lieutenant James Gordon, Batman races against the calendar as he tries to discover who Holiday is before he claims his next victim each month. A mystery that has the reader continually guessing the identity of the killer, this story also ties into the events that transform Harvey Dent into Batman's deadly enemy, Two-Face.