Wonderful Explanation of Each Piece's Power. This book shows the unique abilities of each piece and the typical ways to combine the action of pieces to build combinations. The many examples are taken mostly from actual grandmaster games. This book will amply reward the time spent studying it. I found myself spotting combinations much more often and actually able to plan using pieces together after reading it. The author had a lot of help from Alekhine. It is a shame this classic is out of print. If you can find a copy, buy it.