I've worked in tech for ten years, including in start ups, and the sexism is pretty shocking. I've had a manager tell me he didn't hire a qualified candidate because she was attractive and it would end up in a sexual harassment suit as the male employees were already oggling her. One senior employee told me she was groped. A coop told me she was the subject of a wet t-shirt joke by a fifty year old. A team lead giving massages to female staff non-consensually.
I knew all this going into reading this book. I also knew of the stats as I have given training on diversity in tech. But I still learned so much, from the gendered disparity in VC funding, to explaining the falling admissions rate of women in computer science in universities from its mid-80s peak of 40%.
I learned way more from this than I expected to. Also although I read this with awareness of the tech sector, this is written to be accessible to non-technical people.