[master_yoda_1]

I always get confused who the audience is for these kind of books?

For advanced reader this is really shallow, for beginners its really advanced (who really want to read 543 page book as beginner).

[siddboots]

Simply put, there are many people who are neither "beginners" nor "advanced". There is a section of the book titled Audience which reads

> Bayes Rules! brings the power of Bayes to advanced undergraduate students and comparably trained practitioners. Accordingly, the book is neither written at the graduate level nor is it meant to be a first introduction to the field of statistics.