Quotes from book
Batman: The Killing Joke

Batman: The Killing Joke is a 1988 DC Comics one-shot graphic novel featuring the characters Batman and the Joker written by Alan Moore and illustrated by Brian Bolland. The Killing Joke provides an origin story for the supervillain the Joker, loosely adapted from the 1951 story arc "The Man Behind the Red Hood!". The Joker's origin is presented via flashback, while simultaneously depicting his attempt to drive Jim Gordon insane and Batman's desperate attempt to stop him.

“If I have to have a past, then I prefer it to be multiple choice.”
Source: Batman: The Killing Joke

Batman : The Killing Joke (1988)
Source: Batman: The Killing Joke
Context: When you find yourself locked onto an unpleasant train of thought, heading for the places in your past where the screaming is unbearable, remember there's always madness. Madness is the emergency exit. You can just step outside, and close the door on all those dreadful things that happened.
Forever.