https://www.amazon.com/Introduction-Linear-Algebra-Gilbert-Strang/dp/0980232775/
Went through 85%-90% of this book on BART.. as my step 2 to learn Machine Learning
I didn't intend to read `too much` math before diving into ML, however this book is so well-written that I was not able to put it down. I learnt essential linear algebra concepts in a such a pleasant way.
I don't think I will be afraid of linear algebra part of my future ML study - at least I know where to refer to.