It's a swath of Silicon Valley history in the 70s and thenabouts; short biographies of some folks I'd heard of and others I hadn't. There's a good variety. I didn't learn much about the organizations I'd already read about (Apple, PARC); but I was surprised at some stories I'd overlooked (Genentech, ROLM, ASK…) It was interesting reading about the Genentech founders figuring out that insulin would be a good thing to manufacture because of the huge market as California was voting on whether to regulate dialysis pricing.