I was asked to review this book by Packt Publishing and I found it to be very informative.
I haven't done any 3D rendering in a browser and it was a good start to learn how it is done. I found the examples to be practical and useful tasks that could easily be reused on a website in the future. The speaking style of the book is right on the level, he doesn't expect you to have foreknowledge of 3D rendering and goes into details about the components of a 3D object.
The book goes into details about how to accomplish specific things but it doesn't overly complicate things. I think the most useful part of the book is how he explains the steps, shows pictures of each asset and the accompanying code then shows you an image of the expected outcome. I'm sure there is much more that can be learned about Three.js but this will definitely get me started and I hope to use these techniques soon.