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Not actually necessary really ~ you'd be just as well to read over some online reviews & the chapter titles as it doesn't really add a lot. That said, if you've no intention of getting Black Swan, then this might be enough to give you an overview. But the reading sounded a little suspicious, like it might be autonomated?
The thumbnail instaread is probably all you need, unless you are in finance or science, although the insight itself is worthy of thought on your own.