Good Positional Chess, Planning & Strategy Books for Beginners and Beyond...
https://www.chess.com/blog/RussBell/introduction-to-positional-chess-planning-strategy
Maximize The Usefulness of Your Moves...
http://www.mark-weeks.com/aboutcom/aa06b18.htm
In post #15, I thought that OldPatzerMike answered this admirably. By the way, if I remember correctly, he is the one on the right.