I couldn't even list all the craft books I've found useful. (or remember them!) Story Engineering, Techniques of the Selling Writer, and Save the Cat all helped me grasp plot/structure. I really like Lisa Cron's two newish books on brain research and how that tells us what works about story, one being Wired for Story. I think it was an older O.S. Card book that helped me grasp POV better back when I was but a pup.
Business? That's harder because business changes. For self-publishers, I like Gaughran's Let's Get Digital because he keeps it updated. James Scott Bell has self-published one How To Make a Living as a Writer, which is getting a little old, but he's usually right about everything he says, and another of his that's about what it's title suggest it's about: The Mental Game of Writing, I have on my Kindle and dip back into now and again.
I've also read a whole lot of entrepreneurship books that are not specific to books. Atomic Habits is good on productivity. I've read the 80/20 books, and the thought is good, and yet you can grasp the basics by reading the wikipedia article instead.