Batman: The Killing Joke is a graphic novel written by Alan Moore and illustrated by Brian Bolland. It is widely regarded as one of the greatest Batman stories ever told. The story explores the complex relationship between Batman and his arch-nemesis, the Joker, as the Clown Prince of Crime attempts to drive Commissioner Gordon insane. With its dark and psychological themes, The Killing Joke delves into the depths of the Batman mythos and challenges the reader's perception of heroism and villainy.