_The Splendid and The Vile._ My sister recommended it, and it was great on audiobook. I found the stories about Beaverbrook especially interesting. I found the insight fascinating into what Churchill was thinking during the war, how much he leaned on his closest advisors, and how badly some of Hitler's advisors fucked up. I wound up reading (or listening) to it through the lens of how important relationships are in whatever kind of work that we do. Also, in 2021 I read _The Moral Animal: Why We Are the Way We Are_ and it was the best book I've read in years.
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