Batman: The Killing Joke

Title: Batman: The Killing Joke
Author: Alan Moore
Rating: 4

From what I've read and been told, this is where much of the inspiration of The Joker in The Dark Knight (which I still haven't seen - tried to watch it, but the Blue-Ray from Netflix was scratched).

Blackest Night Issue #3

Title: Blackest Night Issue 3
Author: Geoff Johns
Rating: 4

Confession time: I've always been more of a Marvel fan than DC. This series is paving the way towards a reversal of that feeling.