Sword Art Online or ソードアート・オンライン
is a Japanese light novel series by Reki Kawahara, with illustrations by Abec.
I haven't heard of "Abec" but the style doesn't stun as much as Guilty Crown does. I don't know much about this. But I've been pretty much spoiled by Aizen-Sama.
Am hoping for a lot actually. Animation, battle themes and effects that are well integrated. Seeing that this was a light novel before, it would be assumed (though assuming is a bad habit) that it's rather well written and that the plot would actually carry it.
Loving the theme, and seriously craving to cosplay both protagonists.