My husband asked me what I was reading and when I told him the title he stared at me blankly for a moment and then asked if that wasn't an oxymoron, was the author trying to be funny. Having finished it I can tell you I'm pretty sure that's exactly what he meant.
The book is short, easy to read, and expressly to the point. Chapman has broken magic down to its most bare bones; if you want to know how to make magic happen you can literally toss out your library and just begin by following this formula over and over. And add the other books back in once you've mastered this philosophy. Even a beginner to magic will be able to completely grok and follow this book and make magic start happening.
But be aware this book is a complete deconstruction. If you are the type of person who likes the layers - history, theology, philosophy, symbols and smells and bells and whistles - you are going to detest this book. Chapman's main purpose is to strip away those layers and leave only the necessary scaffolding remaining. Consider yourself forewarned.
Despite this easy beginner approach I wouldn't recommend it to my friends and clients who are just dipping their toes into magic. Not because they couldn't learn from and work with it, but because I think they would miss out on a layer of purpose written into this book. (There are also some things that a true beginner who's read very little else will wonder what the hell he's talking about - not the practices he recommends but the ideas he's deconstructing.) Chapman's deconstruction perfectly works to strip down those layers of tradition and habit and thinking that can be passed on by other teachers and books simply because that's how they were told to do it or it doesn't feel like magic without it, etc... It seems to me that this book is meant to address you after you've ingested some of these other ideas and started forming your own habits and need to have your own magic and thinking taken back to bare bones again. Therefore, not for the beginner, but exactly for the person who is just now ready to begin moving from beginner magic into advanced magical work. A beginner at advanced magic is exactly who this book is ideally for.
So if you've already gotten started on magic and you are at the crossroads that Chapman describes in his book, that place where you feel the call to either "quit dabbling" and go do something serious with your life (though I personally find this option feels more like "it's cool to dabble and go do something real with the rest of your life") or "dedicate your life" to chasing magic. If you're at that crossroads (one of many of them in my experience) and you feel the latter branch calling you to move deeper then this book is exactly the next thing you should read.