To add balance to this topic, I'll give my perspective on the Four Magic Moves to Winning Golf. The book describes a swing that fully sets the wrists by the time the arms are halfway back on the backswing. (This is the opposite of a swing where you extend and create a wide arc going back and set the angle at the top of the swing.) With the angle set halfway back, you just continue turning the shoulders fully and initiate the downswing by sliding and turning the hips to the left. Watch Lee Westwood or Nick Faldo swing and you'll get a good representation of the method. Nothing really unique or "magical" except for one thing I'll mention below.
When the moves are executed correctly, a lot of good things happen. The clubhead will swing back exactly on plane, and when you reach the top of the backswing, the left hand and wrist will be perfectly square and perfectly in line and on plane. You will be wound into a tight athletic position. If you move into the downswing preserving that tight, wound, top of swing position, you will hit the ball with an element of power and precision that you most likely have never experienced. You won't have just an "Ah-Ha!" moment, you'll have a "By golly, I can't believe I just did that!" moment. The magic is that when you execute all the moves properly, you'll hit the most amazing, solid and powerful shot you've ever hit. I've read lots of instruction books and experimented with lots of different methods, and none give me the feeling that I get when I use this method correctly.
There are pitfalls. If you exaggerate the moves you can get closed at the top and you'll hit some of the biggest hooks you can imagine. Like any method, you'll always be making adjustments to keep it tuned. But when you get it tuned and do it correctly, you'll hit shots you are really thrilled with.
With respect to hinge and hold, as soon as Michelson came out with the DVD, I acquired a copy. Since I had always used an early set, his DVD meshed perfectly with what I had always done with my swing. A short game swing is certainly different from a full swing, but the hinge and hold is just a method that keeps the hands ahead of the clubhead through impact. That's very important for short shots. The backward break described in Four Magic Moves works fine with shots Phil describes. Whether Phil does it exactly that way is not important to me because the hinge for short shots is not that technical. You sometimes adjust the way you hinge to get different results.
There is a website that advertises a golf "secret" or "magic moves". I assume that is what Rick mentioned with respect to Andy Brown. I stumbled on the site once and knew immediately it was based on this book. I'm always wary of sites that have a "secret" they won't reveal unless you pay. But since I have no experience with this site, I can't say if the service provided is worthwhile or not. I will say that all of the "secret" and "magical" information is available just by purchasing the book. This book had been out of print for several years, so that may have prompted this service. I once found a copy for a friend in a used book store. Then I noticed last December that it was available on Amazon again. Some portions of the book are outdated since it was written long ago, but all of the swing mechanics and discussions are spot on. There is a section on the physics of the golf swing that is very informative in explaining how the golf swing functions. Anyone interested in learning everything they can about the golf swing will like this book.