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Seth Godin
Seth Godin is the author of more than a dozen bestsellers that have changed the way people think about marketing, leadership, and change, including Permission Marketing, Purple Cow, All Marketers Are Liars, Small is the New Big, The Dip, Tribes, Linchpin, and Poke the Box. He is also the founder and CEO of Squidoo.com and a very popular lecturer. He writes one of the most influential business blogs in the world at sethgodin.com.