Who should read this book?
BI Developers and Consultants who want to know how to develop solutions with this technology. BI Architects and Decision Makers who want to make their decision about using or not using Power BI in their BI applications. Business Analysts who want to have a better tool for playing with the data and learn tricks of producing insights easier. The book titled "Power BI from Rookie to Rockstar" and that means it will cover a wide range of readers.
I'll start by writing 100 level, and we will go deep into 400 level at some stage. So, if you don't know what Power BI is, or If you are familiar with Power BI but want to learn some deep technical topics about Power Query M language, then this book is for you.

Power BI is not a new name in the BI market, components of Power BI has been in the market through different periods. Some components such As Power BI Desktop is such new that released as general availability at 24th of July.