One of the few superhero comics I'd bothered with before, it still holds up and it's clear to see why. It delves into the characters of Joker and Batman and the dynamic between them like nothing had previously. The writing is excellent to the point where no word is wasted,and he isn't afraid to let the panels speak for themselves with some great use of silence. There's a good mixture of humour and tragedy on display and it does an excellent job of balancing out and humanising what could otherwise be very cartoony characters. Combined with Bolland's powerful illustrations and beautiful colouring work it's no surprise that this is one of the go to recommendations in the Batman universe.