I just got this: https://www.amazon.com/gp/product/10...?ie=UTF8&psc=1 yesterday and started on it. Haven't gone through it all (though it isn't a huge book), so will defer a review/opinions/takeaways until I get deeper into it and run some of its drills.
I'm posting this here and not in the competition section because of my belief (based on a quick scan of the entire book) that the concepts in this book are applicable to the practical use of a handgun regardless of context or situation.
One thing I can tell you already is that this is not a book for raw beginners. It isn't a "this is how you do X" book. It's a "this is how you teach yourself to improve X" book.