The Best Book On The Art Of Writing
Last year, literary critic Joseph Epstein wrote The best book on the art of writing that I know is F. L. Lucas' Style: The Art of Writing Well.
At the time of Epstein's comments, the book was long out of print and selling for a small fortune on Amazon ($250 and up).
I'm not sure how I missed this but in response to the demand created by Epstein's recommendation, Harriman House printed another run.
Keep in mind Style: The Art of Writing Well is not a usage guide. The best current usage guide is Garner's Modern American Usage.
Still curious? Check out How To Write With Style by Kurt Vonnegut.