Mr. Grus' book is one of the better data science book I have set my eyes on.

His writing style is friendly and informal. Despite this he covers the mathematical and Computational topics in reasonable depth and always points to further reading at the end of chapters.

The fact that all code used in the book is also explained therein makes the algorithms very graspable.

I would recommend this book anybody who wants to either start with data science or fill in some gaps like was the case with me.

I would love read more books written by Mr. Grus'. I have become a fan.