Good strategy bad strategy (book review)

Good Strategy Bad Strategy: The Difference and Why It Matters [Deckle Edge] [Hardcover]
Richard Rumelt (Author) ISBN-10: 0307886239
ISBN-13: 978-0307886231
please
theis-identify the central lesson the author is trying to teach
central pillar-define and discuss learning out comes
Discussionreflection on the books impact on the future manager.