These are the books I have read and would fully recommend to anyone that wanted to get right to the crux of powerful writing:
There were 10 on this list, but I’ve recently updated it. If I had to pick 4, it would be Writing Tools, On Writing, Make A Scene, and Breathing Life Into Your Characters. The Artful Edit is OK, but not incredible. No Plot is brilliant if you want a kick up the backside – and btw, NANOWRIMO is coming up in (every) November, and this book comes from it.