There are plenty of books that will teach you to be a better writer, but I’ve never found one so immediately useful as Revising Prose by Richard A. Lanham. Following along as Lanham revises example upon example of real world writing is like exercise for your writing muscles.
My favorite takeaway is this tip for improving the rhythm and cadence of your writing. Many of us have learned to read text out loud as a method to reveal awkward transitions or generally dull passages, but you can also spot poor rhythm visually. A red flag for dull cadence is a run of sentences that are all of similar length. Try adding a carriage return after every sentence or phrase, the rhythm is evident:
While other books have increased my knowledge of writing, Revising Prose changed the way I write and how I think about writing. Buy a copy at Amazon.