I will say that people get hell-banned for seemingly self-promoting on HN. Might be good to mix up your submissions with other articles you find interesting, so it doesn't appear as though you are only posting your own writings.
I have submitted a few news article that I've found interesting (from Bloomberg etc) that have also done well on here lately. But you're right. I will make an effort to mix up my submissions! Thanks!
Just a warning as, speaking from experience, it happened unbeknownst to me. Congrats on the book btw!