Boy that’s a hard question. First Man is an absolutely brilliant read about Neil Armstrong. It’s great because it’s not all about nuts and bolts but gets into the state of the world at the time, how people think about space travel, their motivations for wanting to do it, the complexity and difficulty of doing it, and of course what in my view one of the bravest men ever ticks. There’s a million sources that’ll help you understand the engineering and science, but space travel is deeper than that.