Sigh.... I'm not sure what the audience for this book is. Anyone looking to learn the math behind Machine Learning would be much better served learning just what they need and expand their horizon as the need arises. I'm not sure anyone really learns this stuff by just reading a 1000 page book, learning happens nonlinearly, you learn a bit of A, then a bit of C, then a bit of B, and try and connect them together. It always reminds me about the story how Heisenberg didn't know what matrix multiplication once when he came up with his version of quantum mechanics. You don't need to know everything to make an impact.