Speaking of Mad Geniuses, Alan Moore makes his first appearance on this list with The Killing Joke. In my opinion, Moore has churned out more comic classics than any other writer. In The Killing Joke he is paired up with the amazingly talented Brian Bollard.
The Killing Joke is the definitive exploration of the Joker and his relationship with his greatest enemy. Early in the comic, Batman asks Alfred "How can two people hate each other so much without knowing each other?" The comic then proceeds to delve into the Joker's psyche, and what a surprising journey it is. As it delves into his origin story, you begin to feel empathy for this murderous clown, even as you watch him commit atrocity after atrocity.
Of course, just when you feel you understand what motivates him, he lets you know that even he is not sure if he is telling the truth.
If you liked The Dark Knight, take the time to read The Killing Joke. After all, Heath Ledger did.
Tune in tomorrow for #4 on my Top Ten Favorite Comic Stories.