A well-researched book about the Cold War. It talks a lot about spycraft. For me, the parts dealing with Khrushchev were my favorite, as I knew less about him. It made me (as an adult) think a lot about how there are definitely things that we do (say, have missiles in Turkey aimed at the USSR) which we are fine, but if someone does it to us, it's horrible and grounds for potential war. I'm not saying there's a right answer, but reading this as an adult, it made me think about how complicated these things can be.