Batman: The Killing Joke features Batman and the Joker.
 The first issue of the solo spin-off series Batman was notable not only for introducing two of his most persistent enemies, the Joker and Catwoman, but for a pre-Robin inventory story, originally meant for Detective Comics #38, in which Batman shoots some monstrous giants to death
 The Joker and Batman represent opposites: the extroverted Joker wears colorful clothing and embraces chaos, while the introverted, monochromatic Batman represents order and discipline

