I am a professional technical writer. When I started out, I desperately looked for tips and tricks. Internet was (and is) full of tips but I could not find a tech-writing bibliography. I will soon publish a bibliography of books and guides regarding technical writing. I promise to paste a link here when I am finished, which I believe I will be in a day or two.
I have a decent learning & development stipend at my job, and I've been looking to buy some hard copies of technical writing books so I can refer to them easily during the workday. And to intimidate my enemies on Zoom, of course. So far my go-tos are "Docs for Developers" and the classic "Elements of Style", which complement each other well, covering the newest documentation strategies and the oldest nonfiction writing strategies, respectively. I'd really like to start posting reviews to my blog as I read more and build out my own library.