There is so much hype around this book. All over the social media, you can find people posting photos of the book as just unboxed from mail and claiming the book will render them some kind of demi-god of machine learning.
There are a few critic voices, too, but they are put into silence by the very aggressive behavior of the author. I read the book from cover to cover and I can tell you that it is fool's gold backed by a cargo cult.
The book is simply normal content, nothing so special, the same stuff and code you can freely find on blogs and github all over the internet provided by many amateurs and enthusiastic people working in data science. The author is clearly working everyday with data science stuff and he is providing some of his knowledge, though not in a very organized way: the contents are a kind of wild spaghetti data science, a stream of consciousness in an analyst's mind. Don't be amazed if you cannot understand what the author wants to tell you in a chapter because within each chapter, which acts as a content box, the contents are very dispersive and not organized at all. That's all folks, nothing special in it.
You can also find a lot of code that the author claims you have to digit by yourself so you can learn. You have to find the datasets by yourself. That's so much cargo cult. In reality the code is not well explained because the author doesn't explain it but for some comments in the code itself.
Buy at your own risk, if you need a book on doing data science you can find better content buying Hands-On Machine Learning with Scikit-Learn, Keras, and TensorFlow by Aurélien Géron.