There is nothing useful in this book. I thought for 3$ it could not be so bad, but it is.
Let me explain you the easy way to learn a language advertised in this book:
Find a resource that make the learning easy, stick with it and practice.
The rest of this book is filled with "Internet Tools are a great resource for learning, try them" or "Talking with natives is a great advantage".
Not a single little bit of deeper information. Not even one source where to find Online Tools or native speakers.
The "secrets" in this book are common sense and reading this book will not give at least a single little benefit.
The only good thing is, that it is really short, so you are fast through it.
In a nutshell, this was the most useless book I have ever been reading, take another one!