Fortunately I've already read several books on quantum theory and have a basic grasp. If I hadn't, I think this book would have convinced me I was incapable of understanding even a little of it.
Some of the examples were just plain silly - such as photons being much smaller than a full stop (period) - the largest cell in the human body (the ovum) is about that size, and a photon is a subatomic particle! To compare a "." with a photon is like saying a tennis ball is much smaller than the sun!
It's also badly written: sometimes sentences just don't make sense, the author's misuse of apostrophes is painful (its' is a construction I've not seen since primary school, and possesive apostrophes are often missed, and as if to balance this out, they're often used in plurals), the author refers back to things that actually haven't been mentioned, etc.
There are some diagrams, but they are too small to see properly and don't enlarge well
Don't waste time, never mind money, on this. It's unclear, confusing, and badly written. A reader who wants to learn the basics of QED and actually understand someof it would do better to pay out for something like How to Teach Quantum Physics to Your Dog
or Quantum Theory: A Very Short Introduction