Sorry for the flood
An art companion for The Law of Conservation of Energy
by peroxidepest17, as part of Dean/Cas Big Bang
. It's a 90k-words story, an AR after episode 6x20 with a brilliant concept ^^
You can view the full art post over here on my LJ
or download the e-books
Castiel has made a decision and Balthazar worries. I wonder what kind of decision it is?
Come on guys, go read the fic!