This edition of Peter F. Drucker’s management classic will include a new preface, previously published in the Harvard Business Review as “What Makes an Effective Executive.” Reading Line: The Definitive Guide to Getting the Right Things Done Now with a new preface, Drucker’s classic work on effectiveness of leaders shows executives how to manage time; choose what to contribute to the organization; know how and where to mobilize strength for best effect; set the right priorities; and how to knit all of these together with effective decision making.