5.0

First of all, this book is not just for absolute beginners. Often when I am taking a class that is going deep into a technique or algorithm, I get to the point where I cannot pick up my head and see why I am doing something, or where it fits in the machine learning lifecycle. Further, I come across a term that I know, but can't recall its purpose. This is great for that, and I think it should be in the library of everyone studying data science. It is a very short, to-the-point read that can also serve as a reference.