Instruct: Classify the given review as either positive or negative.
Query: Mid-Level Strategy book focusing on a varitey of concepts this author feels is important to learn

This is book at a mid-level skilled player who wants to add on their their basic knowledge of chess. Ideas are taken from actual play and are made into broken down examples. This is instead of using complete games (another excellent way to improve - here one of the mid-level comment on every moves book like "Logical Chess" or "Unbeatable Chess" would fit in well) the author focuses on a variety of concepts that he fees are important. This is certainly a good, but not a great book.