The Killing Joke, one of my favorite Batman stories ever, stirred a bit of controversy because the story involves the Joker brutally, pointlessly shooting Commissioner Gordon's daughter in the spine. This is a no-holds-barred take on a truly insane criminal mind, masterfully written by British comics writer Alan Moore. The art by Brian Bolland is so appealing that his depiction of the Joker became a standard and was imitated by many artists to follow.
The Batman: The Killing Joke FROM THE PUBLISHER
For the first time the Joker's origin is revealed in this tale of insanity and human perseverance. Looking to prove that any man can be pushed past his breaking point and go mad, the Joker attempts to drive Commissioner Gordon insane. After shooting and permanently paralyzing his daughter Barbara (a.k.a. Batgirl), the Joker kidnaps the commissioner and attacks his mind in hopes of breaking the man. But refusing to give up, Gordon maintains his sanity with the help of Batman in an effort to best the madman.