I really can't fault this. I am a professional photographer, but one is always experimenting and practicing, and it's always good to see how other people do it.
Considering the plethora of books on this subject around, and the fact that most of them are either a) directed at newbies/amateurs. or b) just generally misinformed, rubbish, or both, this one hits the nail on the head. It works both for beginners and advanced users, and explains in simple terms what is needed to produce the right effect. It doesn't rely on jargon, and is well laid out and uses good examples accompanied by both photos and diagrams. We've had enough "idiots guides", this is simply a practical guide - thoroughly thumbs up.
It's a really good reference manual without getting too heavy, and I refer back to it regularly. If you have any interest at all in studio photography, this is the one book you need.