I would very very enthusiastically recommend the book: _On Writing Well, 30th Anniversary Edition: The Classic Guide to Writing Nonfiction_ by William Zinsser.
https://www.abebooks.com/servlet/BookDetailsPL?bi=31151879470&searchurl=ds=20&kn=on+writing+well+william+zinsser+30th+anniversary+edition&sortby=17&cm_sp=snippet-_-srp1-_-title1I read this first in high school (back in the Bronze Age) and several times (in updated editions) subsequently. It is not only brilliant and instructive, but it is a very enjoyable read, as befits a book on good writing. Zinssner is not only directly instructive but also cites and excerpts many examples of good writing with very descriptive critiques. The last time I read _On Writing Well..._ I made a bibliography of all his citations and went and read all of the books noted. Particular favorite authors in this list included Joan Didion and E.B. White.
It is not a long or heavy book, and I would personally recommend approaching it in the following way (as I did most recently):
Read it three times.
First time: just blow through it. It is a fun and enjoyable book and a joy to read. Pay attention to what it says, but don't get stalled or bogged down. Enjoy it. You will be through it before you know it, and will be left wanting a sequel.
Second time: Have a clean notebook and a pen on hand and take careful notes. They will most likely suggest themselves.
Third time: Read it through again and enjoy it, but this time write the names of all the cited authors and books that he excerpts and uses as examples. You now have a reading list of excellently crafted writing, almost all of which are very enjoyable to read and make excellent examples of quality writing.
Zinsser is a proponent of clear, concise and lucid expository prose. This is something I find woefully lacking in technical, business and academic writing. His guidance will make you a better writer, and you will be vitally aware of how and why.
--diogenesNY