This is a book based around teaching some basic positional principles by illustrative games and it succeeds in that endeavor, but so do many others. One feature that elevates it beyond many others of its genre is its use of contemporary openings.But the unique value in the book is not the material it teaches but the manner in which the reader is trained to think. This is a series of Socratic dialogs investigating chess positions, during which the reader is expected to participate and form plans based on the position at hand. This is the stuff that you just can't buy in a book (ordinarily). This is chess - at least as I am coming to understand it.This is a must-buy. Even for those whose rating implies you already know the positional lessons you owe it to yourself to work through the games and find the moves. At worst it would be a validation of your progress. At best a game changer.Simply outstanding.