Since I'm no longer a moderator here, I don't know how much I can or should do to keep the sub going, but in the absence of weneedtofederalize, I'll be helping /u/twwsts keep this place alive until he returns (if he returns).
I've made a twitter list with the most referenced institutions for /r/europeanunion which you can add to your tweetdeck or your feeds to keep abreast of the news:
https://twitter.com/i/lists/1132096927535906816
Hope that helps a bit.
Probably not a good idea for a first book, as it requires quite some insight in how the EU works already, but one I'm presently really enjoying to read is Why Europe Should Become a Republic.
In it, author Ulrike Guérot analyses the state of the EU, considers what it currently is a failure because it did not go far enough (and considers neoliberalism and nationalism the main reasons for it failing) and calls for the creation of a republic, a full political and social union, rather than just a monetary union as the EU is now.
Edit: Also Europe is asleep now, you'll probably have to wait a few more hours before others reply. I think I'm going to bed.