What's the best non-fiction book you have read recently?

I’m currently reading The Zookeeper’s Wife by Diane Ackerman. It’s about a family who ran the zoo in Warsaw, about their struggle to survive and to rescue Jews in Nazi occupied Poland. It’s quite a story and a terrific book. There so much great non-fiction being written today, I think, I hardly ever read novels any more. So what are you all reading, what’s out there that’s good in your opinion, that you’re enjoying? Anything you would recommend? The subject matter isn’t that important to me, a good writer can make things I didn’t even know I was interested in absolutely fascinating. Though, I’m done with books on Holocaust related subjects for a while. I’ve read two in the last six months at that about my limit for the year. Maybe something light and breezy for a change?