I’m going with World War Z: An Oral History of the Zombie War mostly because I’m re-reading for some reason; I’m not entirely certain why. It’s certainly worth re-reading, but there was no particular triggering event that caused me to take it off the shelf. Odd.
But I’ve not forgotten The Forgotten Man: A New History of the Great Depression.
I’ll probably re-read that eventually. It’s good. But it’s also very harsh so it’s not really light reading in my view.