Grégoire Chamayou, A Theory of the Drone is forthcoming in English translation with New Press, publication date of August 2014. It doesn’t appear on the press’s site, but is listed on various online bookstores (i.e. here).
I’ve recently read the French version, and don’t have much to add to Derek Gregory’s excellent series of posts on the book. But I think I do have something to say about his earlier Manhunts, and hope to put that together as a short piece, likely for this site, soon.