Someone suggested Quiet: The Power of Introverts in a World That Can't Stop Talking, which is by Susan Cain. Your point stands, though. HN's userbase is massively male-a survey a few years ago put it at 94% [0]. This is presumably because the high-tech startup crowd has identical demographics. These books are mostly related to tech or business, so while the skew is notable, it's an artifact of the broader issue.
I don't think it's a tautology to say HN's users are mostly male because the group it draws from is mostly male. There's room for competing theories like some quality unique to the website. To put my thought in bad ASCII flowchart form:
Male tech startup people -> Male HN users -> Male-dominated interest areas -> Male author recommendations
[0] https://news.ycombinator.com/item?id=5520342