My System is a very good book. By reading and learning it you will understand every opening both better both classical and modern including the Nimzo Indian defence.
Don't expect move order but more the explanation of general opening concepts like development, over protection, the center.
By working trough this book you will improve your entire game. It is highly recommended.
I am reviewing the Nimzo-Indian (I learned it before, but am refreshing my memory of it not having played chess in a while).
I heard that Nimzowitsch wrote a book called "My System," which explains hypermodernism. To my knowledge, Nimzo-Indian is a hypermodern opening. Therefore, I was wondering whether and to what extent reading "My System" will help me understand the ideas behind the Nimzo-Indian.
I look forward to your replies.