"Of all the villains that threaten Gotham City, none is more dangerous-or more persistent-than the Harlequin of Hate himself, the Joker! As Batman's oldest and deadliest foe, this mirthful maniac has served as a fearsome foil to the stoic Dark Knight for decades-and become public enemy number one in the process! More deranged, murderous and resourceful than all of Gotham's other rogues put together, the Joker won't quit until the entire world sinks with him into insanity- something that Batman will never allow!"--