Just announced on the BL Facebook feed.
Promises to open up Inquisitorial goodness for all Imperial armies. Digital exclusive, ala Adepta Sororitas.
And seeing as I'm not aware of this being previously rumoured....
NO ONE EXPECTS CODEX INQUISITION!!!
[url]http://www.blacklibrary.com/Blog/Angels-Daemons-and-Mysterious-Individuals.html[/url]