This week I'm "Waiting on":
by Kendare Blake
Release Date: August 7, 2012
In this follow-up to Anna Dressed in Blood, Cas begins seeing Anna everywhere: sometimes when he’s asleep, and sometimes in waking nightmares. But something is very wrong. These aren’t just daydreams. Anna seems tortured, torn apart in new and ever more gruesome ways every time she appears.
Cas doesn’t know what happened to Anna when she disappeared into Hell, but he knows she doesn’t deserve whatever is happening to her now. Anna saved Cas more than once, and it’s time for him to return the favor.