I believe the best way to improve as a writer is to write. A lot. And to read. A lot.
And to give readers a lot of your writing and enter the tortuous editing cycle. A lot.
And so on.
You’ll notice that books on writing aren’t part of that equation.
The problem is this: good writing is a nebulous concept. It isn’t something that can be simply described and then learned. If it were that easy, everyone would leave grade school a great writer.