A new book, The Art Of The Dark Knight, features early concept art for the Joker that's way freakier and edgier than the version that ended up on screen. We already showed you Bill Sienkiewicz's early Joker art, and now Slashfilm has some of the other Joker concept art. Some of these heavily scarred and punk-rock versions would have been hard to look at for two and a half hours. Click through to see another bizarre Joker pic.

Honestly, my main quibble about these images is that he looks a bit too much like the plague vampires from I Am Legend, and has none of the grubbiness of Heath Ledger's final version. You can see bigger versions, and the rest of the images, over at Slashfilm. [Slashfilm]