Elements of Positional Evaluation

This ground-breaking book by best-selling chess author Dan Heisman addresses the evaluation and understanding of how static features affect the value of the pieces in a given position. 

Now in its fourth edition, emphasis is placed on the static evaluation of each piece’s value and its role in the overall position rather than the assessment of a specific position. 


http://www.newinchess.com/Elements_of_Positional_Evaluation-p-2748.html

http://www.amazon.com/Elements-Positional-Evaluation-Chess-Pieces/dp/0945470770