30 Iconic Comics All Batman Fans Must Own
22. Batman: The Long Halloween
Featuring a plethora of Batman's supporting cast and villains, Batman: The Long Halloween focuses mostly on a mysterious killed called "Holiday" who kills members of Gotham City's mobsters and corrupt officals once a month on major holidays.
Holiday ends up putting Batman, the mob, the cops and Arkham's inmates on tenterhooks and makes for a great story set over the course of a year.