It's an excellent book, the author explains complicated concepts in a simple and understandable way. I really have a great job as a , and you are also learning from the very author of Keras, the most popular framework for machine learning.

In fact, it is important to have knowledge of programming and mathematical concepts (calculus, geometry, derivation, etc.) since Deep Learning is basically pure mathematics; vectors, matrices, vector operations, geometric spaces in various dimensions, etc. It is worth clarifying that the book does NOT use mathematical notations; To make it simpler, the author decides to use instead lines of code that make it much more digestible. However, having knowledge of these concepts gives you the power to understand what is being done and what is being said.