The Killing Joke - Alan Moore & Brian Bolland

Loved it. The Joker's origin story took me by surprise and worked very well as a window into his psyche without making him any less enigmatic or terrifying. Also loved the bit at the end where he acknowledges (in an obscure way) that what he's doing is wrong and for a moment shows regret, and then he makes a joke and Batman laughs at it. For a few panels they are brought together, not reconciled but not in conflict either. It's a gen of a book, short and sharp and confidently crafted.