I just finished reading this. It's not that tangentially related as it's absolutely a history of the Golden Age of comics, being mostly set in the comics world between 1938 and 1954, drawing on conversations with key comic figures from the time and, as you say, is based on real people and events. It's also a fucking fantastic book. Just thinking about Sam & Tracy makes me sad and angry. My only criticism is that it's so good I kept going to sleep really late because I didn't want to stop reading and now I'm knackered.