Here's the translated full volume of Upheaval, compiling the second arc of the Illustrated Stories for your convenience!
Besides the chapters found online and the extra chapters, it has some improved profiles and in-character explanations, so don't miss it. Also, I'm not sure if this was mentioned before, but "Bitoshi Senki" means "Beautiful Fighters' War Records".
Volume 2:
Mirrors/
Sendspace
Drama CD 2:
Mirrors/
Sendspace
The Drama CD that came along with it might be detailing the "embarassing adventure" the twins talked about in chapter 3... or who knows, really :p
I'm still working on the 2nd QG novel, it's coming soon-ish.