I did well in math when I was at school, but I cannot say math is my strength, since I do not think I am good at applying math concepts into real world. And this book is a door opening to this. To be honest, I do not understand 100% of the content in this book, but I tried my best to understand their existence. If this book has taught me to use another way to problem solving or even another perspective to understand world, then that's enough for now.