I'm going to fourth Insurgent Mexico. Like those above, I read Ten Days That Shook the World with enjoyment.
As for Hadrian, it's a book I've meant to read for decades, so an incentive would be a good thing! I think that non-fiction is non-fiction, though, and we don't have many windows for it. So while I'll read it happily, if sun surfer says no perhaps we could nominate it in a more appropriate month?