Every Advanced Chess Player Should Read The Most Instructive Chess Book Ever :My System By Aron Nimzowitsch

My System (German: Mein System) is a book on chess theory written by Aron Nimzowitsch. Originally over a series of five brochures from 1925 to 1927, the book — one of the early works on hypermodernism — introduced many new concepts to followers of the modern school of thought. It is generally considered to be one of the most important chess books of all time...
The book is divided into three parts: The Elements, Position Play, and Illustrative Games.(http://en.wikipedia.org/wiki/My_System)