40. 'Pluto,' Naoki Urasawa
Essentially a grim-and-gritty cover (reboot? update?) of manga god Osamu Tezuka's Astro Boy, this stellar revamp recasts a vintage Astro storyline as a techno-noir, full of killer robots, Philip K. Dick-ish runs about the nature of humanity and an allegory about the War in Iraq. It doesn't quite do to Tezuka what Hendrix's All Along the Watchtower did to Dylan's song, but it's close.