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I was hoping to have some insight into Warren Buffet method with this book, but it just contain the history of his accomplishment. A lot of this book give me a deja-vu feeling like I've read it somewhere else.
The book doesn't feel very organize and it looks like it was put together by cut-and-paste from a number of different articles.
I don't know about Buffet's annual letters, but I have read books that talk about his style/philosophy of investing. And this book seems to do the same. It severely lacks originality and brings nothing new to the table. A high school student could summarize 10-12 books from Buffet's investment principles and do a better job than this. There are much better books in the market, I would pass on this one.
If, like me, you are a Buffet admirer, and have read the substantial biography The Snowball, plus a selection of Buffer's letters to investors, you will learn nothing from this book. In fact, you will be rather bored, even though the book is not at all long.
It's possible that the book may be more valuable to people not yet familiar with the subject.