other books is we start with a very focused introduction to the kind of math that you need to do deep learning I think one thing that I got from your courses at Stanford is the linear algebra and probability are very important that people get excited about the machine learning algorithms but if you want to be a really excellent practitioner you've got to master the basic math that underlies the whole approach in the first place so we make sure to give a very focused presentation of the basics that's a start book that way you