The best guide I've ever read to writing nonfiction is William Zinsser's "On Writing Well". If you do any writing for work or pleasure, his advice is indispensable:
https://www.amazon.com/Writing-Well-Classic-Guide-Nonfiction...
https://www.amazon.com/Writing-Well-Classic-Guide-Nonfiction...
https://www.amazon.com/Writing-Well-Classic-Guide-Nonfiction...
I tend to rely more on 1-star reviews than 5-star ones. I find them to be more reliable guides.
May I suggest that you write well in spite of the advice given here rather than because of it. :)